© Marion Center Speedway  484 Potts Road  Marion Center, PA  15759                                                          WEBSITE BY: MARION CENTER SPEEDWAY

2017 Rules for All Classes in Truck Pull:

CLASSES: Hot Street Diesel ………. Download Modified Street Legal Gas Trucks ………. Download Open Street Gas Trucks ………… Download Outlaw 4WD Trucks ………… Download Show Room Gas Trucks ………… Download Stock Diesel Trucks ………… Download MARION CENTER SPEEDWAY Truck Pull Rules Hot Street Diesel The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Weight  --  Maximum 8500 lbs. with driver. No duels on rear on non-dually No hood stacks No air to water intercooler Hanging weight allowed Solid rear suspension allowed but not trussed/welded – has to be removable. Fuel only E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Modified Street Legal Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6300 lbs. with driver. 26 inch hitch height.  Hanging weight allowed.  No more than 24 inches from farthest forward point Bolt in blocks allowed only. Must have 3 leaf springs, EOM suspension. Must have 1 inch downward movement at all times. Maximum 35 x 12.50 tires. Open headers are allowed. Race fuel allowed.  NO Q16 or Oxidizers. Single carb. All engine accessories belt driven.  No electrical driven. OEM wheel base Drive line must match vehicle model 1 ton or less.  No duel wheels. Battery in factory location. Hook point farthest point to back of truck. Style hitch Current license & inspection. No solid suspensions are permitted.  Suspension must have a minimum of 1 inch of downward movement at all times.  Driver must be able to demonstrate FREE downward movement with no use of mechanical advantage.  No ratchet straps, binders or other mechanical means.  No blocks are allowed between axle housing and truck frame that would restrict the necessary 1 inch of movement.  If a truck has airbags, the system must be disabled.  Traction bars are permitted if they are only bolt on and completely removable.  Traction bars must be pivotal. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Open Street Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6300 lbs. with driver. 26 inch hitch height.  Hitch 27% of wheel base.  Hanging weight 60 inches from center front axle. Open on engine and add on parts (heads, intake, single carb) No cut tires. No V-bars. Maximum 35 x 12.50 tires. Race fuel only.  No Alcohol. Battery, fuel, pump, elet allowed on weight box. Kill switch when pulled must shut down fuel pump and ignition. Safety:  if not licensed and insured, must have fire jacket and helmet. Drive shaft loops required on trucks not licensed for street. Auto trans blanket on non-licensed trucks. Must have Bloof proof bell housing. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Outlaw 4wds The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Weight  --  Maximum 8000 lbs. with driver. Weights  --  Added weights are permitted.  Hanging weights may not extend more than 60 inches from the centerline of the front axle.  Any loss of ballast while hooked to the sled is cause for disqualification.  No fuel or water may be added to the truck after it has crossed the scales. Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment. Body & Frame  --  A tube frame is permitted.  A fiberglass body with working doors and complete firewall that seals the driver compartment is acceptable. Driveline  --  After market transmissions and transfer cases are permitted.  Axle shields are required and will be .060 inch thickness in steel or aluminum.  Shield shall not be mounted to axle ends or hub bolts.  An access hole may be left open to allow locking in the hubs. Driveshaft Loops  --  All trucks must have at least 6 inch wide u-joint shields around the rear u- joints constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the ends of each shaft.  In addition there will be at least one shaft loop in the middle of the drive shaft.  All shields must be securely mounted to the vehicle.  Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft. Engine: Gasoline or Alcohol  --  Engines may utilize a single super charger or a single turbo charger.  Screw type blowers are not permitted.  Fuel injection is permitted.  Aluminum blocks and aluminum heads are permitted.  Bore spacing may be altered.  All NTPA necessary safety equipment and restraints on the super charger must be followed.  A single turbo charger is also permitted in this configuration.  Super charged or turbo charged engines are limited to 572 cubic inches.  Hood stacks allowed. Engine: Diesel  --  Engines are restricted to 6 cylinder and 8 cylinder compression ignition engines.  Class maximum of 450 cubic inches will be enforced.  Diesel engine must have been available in a one tone or less truck from the factory.  Sigma fuel pumps are permitted.  Water injection is permitted.  The fuel must be pump #1/#2 diesel only.  Soy or Bio-diesel fuel is permitted.  No Alcohol for fuel.  Diesel engines may use an unlimited size single (1) turbo charger.  A diesel engine running without a muffler must have cross bolts installed in their exhaust system.  Hood stacks allowed E X C E P T I O N:  Any diesel truck running more than turbo chargers in any configuration will hook with a 24 inch drawbar at 7600 pounds. All inline turbocharged engines must have one cable totally surrounding the engine block and head. The cable will be 3/8 inch diameter Cable must have minimum of two clamps at all splices Cable will have 4 inches to 6 inches of slack Master Cutoff: Diesel Engine  --  A sled- and driver- operated spring loaded emergency air shut off is mandatory.  The cable must terminate into a 2 inch diameter steel ring. Fuel Cutoff:  Diesel Engine  --  All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injections pump.  A three way dump valve is required. Floor  --  Each vehicle in competition must be equipped with an OEM floor pan or a minimum 0.024 inch steel floor pan or lexan that extends the full length and width of the driver seating area.  Non-OEM floor pans must have cross members (minimum 2 inch by 2 inch, 0.083 inch wall thickness square tubing) installed between the frame rails for proper seat and driver restraint system installation and support.  All openings must be sealed with metal0excluding grommets.  The use of fiberglass and/or magnesium is prohibited.  The vehicle must be equipped with one seat for the driver; it must be properly installed. Firewall  --  Each vehicle must be equipped wit and EOM or minimum 0.024 inch steel or lexan firewall, extending from side to side of the body and from the top of the engine compartments upper seal (hood, cowl, or deck) in the bottom of the floor and/or belly pan.  The firewall must provide a bulkhead between the engine and/or fuel tank and driver compartment.  All openings must be sealed with metal-excluding grommets.  The use of magnesium is prohibited. Flywheel Shield  --  All vehicles equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater.  Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing may be used in place of the shield; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened. Safety  --  Fire suits are required at a minimum of SFI 3.2.  In flip top bodied vehicles without a firewall or working doors, the driver will be required to wear an SFI approved suit.  Driver must wear a helmet meeting SNELL 85, 90, 95, 2000, K98, or SFI Spec 31.1.  A fire extinguisher system is permitted.  It must be securely mounted. Driver Restraint System  --   The OEM restraint system is mandatory and must be worn.  A five point safety harness is highly recommended in the class. Exhaust  --  The exhaust on a GASOLINE or ALCOHOL vehicle may exit downward at the back of the truck or directly out the back of the truck or straight up through the hood of the truck or straight up at the back of the cab.  All DIESEL vehicles must be equipped so as to direct exhaust upward.  Exhaust through the hood is permitted.  Tow 3/8 inch diameter bolts must be placed in a cross pattern within 1 inch of each other as close to the final turbo as is practical. Other Fuel & Additives  --  Propane is prohibited on any engine.  Other oxygen extenders are prohibited such as propylene oxide additives.  Racing fuel is permitted but not oxygenated racing fuel such as VP113 and Q16.  System components used for these banned substances must be fully removed from the truck.  Fuel checks may be taken at any time by the officials. Nitrous Oxide  --  Nitrous Oxide is permitted for use on any naturally aspirated gasoline engine.  This may not be used with alcohol or with any turbo charged or super charged engine. Hitch  --  The hitch must be constructed of solid material that is properly attached and braced.  The hooking point must be at least 3.75 inches by 3.5 inches.  The length of the hitch measured from the center of the rear axle to the hitch point may be no shorter than 27% of the actual wheelbase of the truck.  The hitch must be horizontal to the ground and stationary in all directions.  The hooking point must have a minimum 3.750 inch inside diameter opening for the sled hook.  The hooking point will be measured to the center of the clevis loop.  The area where the hook point is at must be free and clear of nay obstructions.  No lever, pivot, axis or other types of ‘trick’ hitches are prohibited.  No vertical hitches, all hitches must be 33 degrees or less parallel to the ground  A second hitch is not required in this class.  Owners of trucks with a second hitch must assure that the second hitch is ‘taped off’ – this is the owner’s responsibility.  The hooking point will be measured to the rear of the opening in the clevis/hook. Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-throttle controls is prohibited. Kill Switch  --  All trucks must be equipped with a Kill Switch. Mini Trucks  --  Mini trucks (S-10, Ranger, Dakota, etc.) are permitted to run V-8 engines – location to be the save as full-sized trucks. Suspension  --  No suspension is required.  A solid suspension is permitted.  Lift Kits are acceptable. Throttle  --  Either the normal foot throttle or an approved spring-loaded hand throttle will be permitted in this class. Tires  --  All forms of pulling tires are permitted including Bar tires, Cepeks, cut tires, etc.  Tires may be no more than 36 inches tall. Transmission: Automatic  --  Aftermarket transmissions are permitted.  Aftermarket torque converters, valve bodies and internal components are permitted.  Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic or high- pressure type hose.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a transmission shield meeting SFI spec 4.1 and must be labeled accordingly.  A blanket-type shield, appropriately labeled as meeting SFI Spec 4.1 and extending from the rear of the block to front of tail housing with a minimum 6 inch overlap where it is fastened, is permitted.  All non-blanket-type shields must incorporate two (or one, per manufacturer’s instructions) ¾ inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1. Transmission: Manual  --  After market transmissions and transfer cases are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles that are collecting points.  All transmissions must be clutch assisted.  Sequential shifters are prohibited. Wheelbase  --  The minimum allowed wheelbase is 90 inches; the maximum allowed is 180 inches.  The maximum wheelbase variation from left to right in 1 inch; the measurement will be made using an X pattern (LF-RR and RF-LR).  The maximum tread width is 102 inches.  Extending rear wheels beyond the OEM position is permitted. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Show Room Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6500 lbs. with driver. 26 inch hitch height. 3 bolt ons (example:  Carb Aluminum intake, exhaust) No Blocks or Clamps No Hanging weight or box.  All weight in truck bed and secured. Bars allowed No cut tires. No stud tires.  No chains. Hook point farthest point to back of truck. Reese style hitch Current license & inspection. 3.75 by 3.5 opening on devise and driver supplies own. No race fuel or oxidizer.  Pump gas ONLY. Exhaust throw muffler exit behind cab. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Stock Diesel The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. This class is designed for daily-driven, on the road pickup trucks (full-bodied diesel pickup trucks).  Valid DOT registration and license plates are mandatory.  If your truck is street legal and built to the rules set forth herein, you can enter this class.  Registration papers are required to prove that the truck is licensed for street use.  A license plate with the current sticker tag is required to be affixed to the truck.  Where applicable, a current inspection sticker is required.  Trucks may be hauled to the pull.  Trucks dominating the class will be move up.  Tech officials reserve the right to determine the legality of the truck. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S STOCK NO SITTING ON LINE BUILDING BOOST ROLL BOSSTING FIND.  FORDS NO LIMIT STRAPS IN FRONT END. Weight  --  Maximum 8500 lbs. with driver. Ballast  --  Ballast is permitted.  Hanging front weights are prohibited.  Ballast may be added in the bed of the truck.  If used, ballast must be securely fastened to the BED ONLY.  Final decisions rest with the tech officials.  Adding weight in other areas of the truck will result in a DQ. Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment or forward of the radiator core support. Body  --  The body and truck bed must be the OEM truck body, including the full bed floor and side skins both inner and outer.  The body must retain full OEM sheet metal.  Metal aftermarket hoods are permitted.  Fiberglass is prohibited.  The hood must be closed and securely latched while the vehicle is hooked to the sled.  The complete OEM firewall and OEM floor pan is mandatory. Brakes  --  Four-wheel hydraulic brakes are mandatory. Bumpers  --  Front bumpers must be Unaltered Factory stock.  No weighted front devices are permitted.   This includes but limited to:  Homemade bumpers, Brush Guards, “Ranch Hand” type bumpers & winches.  Lower brackets (only) for snowplows frames are permitted so long as no modifications that would add weight are present.  An unaltered decorative brush guard may be permitted at the option of the head tech officials.  Final decisions rest with the tech officials.  Trucks may NOT compete without a bumper. Chassis  --  The OEM chassis is mandatory.  The engine must be in the OEM location for the body is used.  The vehicle must retain the full OEM chassis.  Wheel tubs, back-half conversions, tube chassis, etc., are prohibited. Cooling System  --  Radiators must be in the stock location and be of at least stock size. Credentials  --  All drivers must have a valid state driver’s license. Driveline  --  An OEM transmission and transfer case is mandatory.  They must have been an option on a one-ton or smaller pickups. Engine  --  The engine shall be stock appearing, OEM make- specific compression ignition engine. Driver Restraint System  --   The OEM restraint system is mandatory and must be worn. Exhaust  --  The exhaust must exit rearward of the driver’s compartment.  Stacks exiting through the hood or fender well are prohibited. Fuel  --  The fuel must be pump #1/#2 diesel only.   Soy/Bio-diesel fuel is permitted.  Off-road diesel fuel is prohibited. Nitrous Oxide  --  Is PROHIBITED along with other oxygen extenders and the use of PROPANE is also PROHIBITED.  All system components MUST be removed. Fuel Injection Pump  --  The fuel injection pump is limited to a stock-appearing, OEM engine model- specific pump only.  The use of multiple high-pressure common-rail pumps is prohibited.  Powerstroke engines with a single factory turbo may utilize a second HPOP.  Pumps from different years in the same engine model may be interchanged. Fuel System  --  The OEM fuel tank is mandatory and must be used.  Racing fuel cells are prohibited and must be removed from the vehicle. Harmonic Balancer --  All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI Spec 18.1. Hitch  --  The hitch must be a receiver-style hitch; reinforcements are permitted.  Reinforcements must not extend forward of the centerline of the rear axle or to the axle housing itself.  Trick hitches are prohibited.  The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the tailgate.  The hitch must be horizontal to the ground and stationary in all directions.  Bumpers may be notched or removed.  The hitch’s height from the ground may not exceed 26 inches on 4wd units and 30 inches on 2wd units.  The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook.  The hooking point will be measured to the center of the clevis loop. Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-throttle controls is prohibited. Rear End  --  Non-OEM rear-end housings are prohibited.  It must have been an option on a one- ton or smaller pickup.  Rear axle bolts must be covered by a cap or shield. Steering  --  The vehicle must retain the full, original OEM steering gear.  The vehicle must retain the original OEM power steering assistance, if it was so equipped.  Additional stabilizers are permitted.  Non-OEM power assist methods are prohibited. Street Equipment  --  Complete headlight and taillight assemblies (all) are mandatory and must be operative.  Complete OEM windshield and windows are mandatory.  Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means.  Suspension: Front  --  The upper mounting point for strut assemblies must be in the factory location.  Adjustable caster/camber pillow ball mounts are permitted.  The lower control arm may be strengthened provided factory-mounting points to chassis are maintained.  The lower mounting point for the strut assembly may be modified for improved caster or camber.  Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Suspension: Rear  --  An OEM-style suspension is mandatory.  Lowering or raising the vehicle height with suspension modifications is permitted.    All OEM suspension mounting points must be retained and used.  Sway bars, limit straps, and camber kits are permitted.  The rear suspension must maintain a full compression shock travel.  All rear suspensions must use at least one working shock absorber per wheel.  No Limiting blocks or lock out. Tires  --  The tires must be DOT street tires.  Cut tires are prohibited.  Dual wheels are permitted only on trucks with a specific OEM bed designed for this application.  Maximum tire width for dual wheels is 14 inch total. Transmission: Automatic  --  Non-OEM transmissions are prohibited.  Aftermarket torque converters, valve bodies and internal components are permitted.  Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic or high- pressure-type hose.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled accordingly.  A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec 4.1 and it must extend from the rear of the block to the front of tail housing with a minimum 6 inch overlap where it is fastened.  All non-blanket type shields must incorporate two (or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1. Transmission: Manual  --  Non-OEM transmissions are prohibited.  Aftermarket internal components are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles with engines running 4500 RPM or more.  All manual transmissions must be clutch assisted.  Sequential shifters are prohibited.  All vehicles with engines running 4500 RPM or more and equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater.  Applications for  which an SFI Spec Flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened. Transfer Case  --  Non-OEM transfer case are prohibited.  The transfer case must have been an option on a one-ton or smaller pickup truck. Tuner  --  A single tuner (Edge, Bully Dog, etc.) is permitted. Turbocharger  --  The turbocharger is limited to a stock-appearing, OEM/Factory make-specific charger only.  Turbochargers from different years in the same make may be interchanged, no adapters to accept other model turbo.  6.4 liter Powerstroke engines may utilize the factory twin turbo configuration.  Any cut, notched or etc. of the turbo wheels/blades will result in a disqualification.  Turbo housing must be unaltered OEM/Factory with no provision made for extra air flow and/or machining to allow larger turbo wheel in the housing.  No busing of the inducer is permitted.  Aftermarket wheels in a stock unaltered housing are permitted.  Failure to allow for turbo inspection will result in immediate disqualification.  Any truck disqualified for this reason will be required to undergo a compete super tech prior to any further completion.  Absolutely no refunds for any illegal turbo found after the class has pulled.  NOTE:  IF YOU TRUCK CONSISTENELY RUNS IN THE TOP THREE PLACES YOU WILL BE CHECKED. Water Injection  --  Water injection is prohibited.  All system components must be removed from the truck. Wheelbase  --  The vehicle must retain the original factory wheelbase and track width. NOTE:  A TEEL-TALE TACHOMETER or A COMPUTER DATA LOG MAY BE REQUIRED ON THE TRUCK (AT THE OWNER’S EXPENSE) IN ORDER TO PROVE THAT THE ENGINE IS RUNNING UNDER 4500 RPM AND THAT THE SAFETY EQUIPMENT IS NOT NECESSARY ON THAT TRUCK. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP)  
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Marion Center Speedway

Marion Center Speedway The Thrill On The Hill

The Thrill On The Hill

© Marion Center Speedway  484 Potts Road, Marion Center, PA 15759 Website By: Marion Center Speedway

Marion Center Speedway

Marion Center Speedway The Thrill On The Hill

The Thrill On The Hill

2017 Rules for all Classes in Truck Pull:

Classes: Hot Street Diesel ………… Download Modified Street Legal Gas Trucks ………… Download Open Street Gas Trucks ………… Download Outlaw 4WD Trucks ………… Download Show Room Gas Trucks ………… Download Stock Diesel Trucks ………… Download MARION CENTER SPEEDWAY Truck Pull Rules Hot Street Diesel The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Weight  --  Maximum 8500 lbs. with driver. No duels on rear on non-dually No hood stacks No air to water intercooler Hanging weight allowed Solid rear suspension allowed but not trussed/welded – has to be removable. Fuel only E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Modified Street Legal Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6300 lbs. with driver. 26 inch hitch height.  Hanging weight allowed.  No more than 24 inches from farthest forward point Bolt in blocks allowed only. Must have 3 leaf springs, EOM suspension. Must have 1 inch downward movement at all times. Maximum 35 x 12.50 tires. Open headers are allowed. Race fuel allowed.  NO Q16 or Oxidizers. Single carb. All engine accessories belt driven.  No electrical driven. OEM wheel base Drive line must match vehicle model 1 ton or less.  No duel wheels. Battery in factory location. Hook point farthest point to back of truck. Style hitch Current license & inspection. No solid suspensions are permitted.  Suspension must have a minimum of 1 inch of downward movement at all times.  Driver must be able to demonstrate FREE downward movement with no use of mechanical advantage.  No ratchet straps, binders or other mechanical means.  No blocks are allowed between axle housing and truck frame that would restrict the necessary 1 inch of movement.  If a truck has airbags, the system must be disabled.  Traction bars are permitted if they are only bolt on and completely removable.  Traction bars must be pivotal. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Open Street Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6300 lbs. with driver. 26 inch hitch height.  Hitch 27% of wheel base.  Hanging weight 60 inches from center front axle. Open on engine and add on parts (heads, intake, single carb) No cut tires. No V-bars. Maximum 35 x 12.50 tires. Race fuel only.  No Alcohol. Battery, fuel, pump, elet allowed on weight box. Kill switch when pulled must shut down fuel pump and ignition. Safety:  if not licensed and insured, must have fire jacket and helmet. Drive shaft loops required on trucks not licensed for street. Auto trans blanket on non-licensed trucks. Must have Bloof proof bell housing. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Outlaw 4wds The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Weight  --  Maximum 8000 lbs. with driver. Weights  --  Added weights are permitted.  Hanging weights may not extend more than 60 inches from the centerline of the front axle.  Any loss of ballast while hooked to the sled is cause for disqualification.  No fuel or water may be added to the truck after it has crossed the scales. Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment. Body & Frame  --  A tube frame is permitted.  A fiberglass body with working doors and complete firewall that seals the driver compartment is acceptable. Driveline  --  After market transmissions and transfer cases are permitted.  Axle shields are required and will be .060 inch thickness in steel or aluminum.  Shield shall not be mounted to axle ends or hub bolts.  An access hole may be left open to allow locking in the hubs. Driveshaft Loops  --  All trucks must have at least 6 inch wide u- joint shields around the rear u-joints constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely contain the u-joint and the ends of each shaft.  In addition there will be at least one shaft loop in the middle of the drive shaft.  All shields must be securely mounted to the vehicle.  Any front shaft u-joint that is visible from the side of the truck must be shielded to contain the u-joint and the end of the shaft. Engine: Gasoline or Alcohol  --  Engines may utilize a single super charger or a single turbo charger.  Screw type blowers are not permitted.  Fuel injection is permitted.  Aluminum blocks and aluminum heads are permitted.  Bore spacing may be altered.  All NTPA necessary safety equipment and restraints on the super charger must be followed.  A single turbo charger is also permitted in this configuration.  Super charged or turbo charged engines are limited to 572 cubic inches.  Hood stacks allowed. Engine: Diesel  --  Engines are restricted to 6 cylinder and 8 cylinder compression ignition engines.  Class maximum of 450 cubic inches will be enforced.  Diesel engine must have been available in a one tone or less truck from the factory.  Sigma fuel pumps are permitted.  Water injection is permitted.  The fuel must be pump #1/#2 diesel only.  Soy or Bio-diesel fuel is permitted.  No Alcohol for fuel.  Diesel engines may use an unlimited size single (1) turbo charger.  A diesel engine running without a muffler must have cross bolts installed in their exhaust system.  Hood stacks allowed E X C E P T I O N:  Any diesel truck running more than turbo chargers in any configuration will hook with a 24 inch drawbar at 7600 pounds. All inline turbocharged engines must have one cable totally surrounding the engine block and head. The cable will be 3/8 inch diameter Cable must have minimum of two clamps at all splices Cable will have 4 inches to 6 inches of slack Master Cutoff: Diesel Engine  --  A sled- and driver- operated spring loaded emergency air shut off is mandatory.  The cable must terminate into a 2 inch diameter steel ring. Fuel Cutoff:  Diesel Engine  --  All trucks must be equipped with a driver operated fuel shutoff capable of blocking fuel flow to the injections pump.  A three way dump valve is required. Floor  --  Each vehicle in competition must be equipped with an OEM floor pan or a minimum 0.024 inch steel floor pan or lexan that extends the full length and width of the driver seating area.  Non-OEM floor pans must have cross members (minimum 2 inch by 2 inch, 0.083 inch wall thickness square tubing) installed between the frame rails for proper seat and driver restraint system installation and support.  All openings must be sealed with metal0excluding grommets.  The use of fiberglass and/or magnesium is prohibited.  The vehicle must be equipped with one seat for the driver; it must be properly installed. Firewall  --  Each vehicle must be equipped wit and EOM or minimum 0.024 inch steel or lexan firewall, extending from side to side of the body and from the top of the engine compartments upper seal (hood, cowl, or deck) in the bottom of the floor and/or belly pan.  The firewall must provide a bulkhead between the engine and/or fuel tank and driver compartment.  All openings must be sealed with metal-excluding grommets.  The use of magnesium is prohibited. Flywheel Shield  --  All vehicles equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater.  Applications for which an SFI Spec flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing may be used in place of the shield; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened. Safety  --  Fire suits are required at a minimum of SFI 3.2.  In flip top bodied vehicles without a firewall or working doors, the driver will be required to wear an SFI approved suit.  Driver must wear a helmet meeting SNELL 85, 90, 95, 2000, K98, or SFI Spec 31.1.  A fire extinguisher system is permitted.  It must be securely mounted. Driver Restraint System  --   The OEM restraint system is mandatory and must be worn.  A five point safety harness is highly recommended in the class. Exhaust  --  The exhaust on a GASOLINE or ALCOHOL vehicle may exit downward at the back of the truck or directly out the back of the truck or straight up through the hood of the truck or straight up at the back of the cab.  All DIESEL vehicles must be equipped so as to direct exhaust upward.  Exhaust through the hood is permitted.  Tow 3/8 inch diameter bolts must be placed in a cross pattern within 1 inch of each other as close to the final turbo as is practical. Other Fuel & Additives  --  Propane is prohibited on any engine.  Other oxygen extenders are prohibited such as propylene oxide additives.  Racing fuel is permitted but not oxygenated racing fuel such as VP113 and Q16.  System components used for these banned substances must be fully removed from the truck.  Fuel checks may be taken at any time by the officials. Nitrous Oxide  --  Nitrous Oxide is permitted for use on any naturally aspirated gasoline engine.  This may not be used with alcohol or with any turbo charged or super charged engine. Hitch  --  The hitch must be constructed of solid material that is properly attached and braced.  The hooking point must be at least 3.75 inches by 3.5 inches.  The length of the hitch measured from the center of the rear axle to the hitch point may be no shorter than 27% of the actual wheelbase of the truck.  The hitch must be horizontal to the ground and stationary in all directions.  The hooking point must have a minimum 3.750 inch inside diameter opening for the sled hook.  The hooking point will be measured to the center of the clevis loop.  The area where the hook point is at must be free and clear of nay obstructions.  No lever, pivot, axis or other types of ‘trick’ hitches are prohibited.  No vertical hitches, all hitches must be 33 degrees or less parallel to the ground  A second hitch is not required in this class.  Owners of trucks with a second hitch must assure that the second hitch is ‘taped off’ – this is the owner’s responsibility.  The hooking point will be measured to the rear of the opening in the clevis/hook. Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-throttle controls is prohibited. Kill Switch  --  All trucks must be equipped with a Kill Switch. Mini Trucks  --  Mini trucks (S-10, Ranger, Dakota, etc.) are permitted to run V-8 engines – location to be the save as full- sized trucks. Suspension  --  No suspension is required.  A solid suspension is permitted.  Lift Kits are acceptable. Throttle  --  Either the normal foot throttle or an approved spring-loaded hand throttle will be permitted in this class. Tires  --  All forms of pulling tires are permitted including Bar tires, Cepeks, cut tires, etc.  Tires may be no more than 36 inches tall. Transmission: Automatic  --  Aftermarket transmissions are permitted.  Aftermarket torque converters, valve bodies and internal components are permitted.  Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic or high- pressure type hose.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a transmission shield meeting SFI spec 4.1 and must be labeled accordingly.  A blanket-type shield, appropriately labeled as meeting SFI Spec 4.1 and extending from the rear of the block to front of tail housing with a minimum 6 inch overlap where it is fastened, is permitted.  All non-blanket-type shields must incorporate two (or one, per manufacturer’s instructions) ¾ inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RMP or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1. Transmission: Manual  --  After market transmissions and transfer cases are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles that are collecting points.  All transmissions must be clutch assisted.  Sequential shifters are prohibited. Wheelbase  --  The minimum allowed wheelbase is 90 inches; the maximum allowed is 180 inches.  The maximum wheelbase variation from left to right in 1 inch; the measurement will be made using an X pattern (LF-RR and RF-LR).  The maximum tread width is 102 inches.  Extending rear wheels beyond the OEM position is permitted. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Show Room Gas Truck The rules promulgated in these rules are intended as guidelines for the 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S Maximum 6500 lbs. with driver. 26 inch hitch height. 3 bolt ons (example:  Carb Aluminum intake, exhaust) No Blocks or Clamps No Hanging weight or box.  All weight in truck bed and secured. Bars allowed No cut tires. No stud tires.  No chains. Hook point farthest point to back of truck. Reese style hitch Current license & inspection. 3.75 by 3.5 opening on devise and driver supplies own. No race fuel or oxidizer.  Pump gas ONLY. Exhaust throw muffler exit behind cab. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (BACK TO TOP) MARION CENTER SPEEDWAY Truck Pull Rules Stock Diesel The rules promulgated in these rules are intended as guidelines for the diesel 4x4 trucking pulling sport.  Nothing herein should be construed as a guarantee against injury or death to participants, crewmen, family members, bystanders or spectators.  Each participant must assure that their equipment and replacement equipment throughout the season meet the requirements for this class. This class is designed for daily-driven, on the road pickup trucks (full-bodied diesel pickup trucks).  Valid DOT registration and license plates are mandatory.  If your truck is street legal and built to the rules set forth herein, you can enter this class.  Registration papers are required to prove that the truck is licensed for street use.  A license plate with the current sticker tag is required to be affixed to the truck.  Where applicable, a current inspection sticker is required.  Trucks may be hauled to the pull.  Trucks dominating the class will be move up.  Tech officials reserve the right to determine the legality of the truck. The vehicle may be two or four-wheel drive.  Pulling vehicles may be held for post competition tech inspection.  Failure to abide may result in a DQ.  Top five trucks may be held at the end of track in a holding area for post pull inspection.  It is the driver’s responsibility to be aware of their placing and be present with the truck in the inspecting area. R E G U L A T I O N S STOCK NO SITTING ON LINE BUILDING BOOST ROLL BOSSTING FIND.  FORDS NO LIMIT STRAPS IN FRONT END. Weight  --  Maximum 8500 lbs. with driver. Ballast  --  Ballast is permitted.  Hanging front weights are prohibited.  Ballast may be added in the bed of the truck.  If used, ballast must be securely fastened to the BED ONLY.  Final decisions rest with the tech officials.  Adding weight in other areas of the truck will result in a DQ. Batteries  --  The batteries must be securely mounted.  They may not be located in the driver compartment or forward of the radiator core support. Body  --  The body and truck bed must be the OEM truck body, including the full bed floor and side skins both inner and outer.  The body must retain full OEM sheet metal.  Metal aftermarket hoods are permitted.  Fiberglass is prohibited.  The hood must be closed and securely latched while the vehicle is hooked to the sled.  The complete OEM firewall and OEM floor pan is mandatory. Brakes  --  Four-wheel hydraulic brakes are mandatory. Bumpers  --  Front bumpers must be Unaltered Factory stock.  No weighted front devices are permitted.   This includes but limited to:  Homemade bumpers, Brush Guards, “Ranch Hand” type bumpers & winches.  Lower brackets (only) for snowplows frames are permitted so long as no modifications that would add weight are present.  An unaltered decorative brush guard may be permitted at the option of the head tech officials.  Final decisions rest with the tech officials.  Trucks may NOT compete without a bumper. Chassis  --  The OEM chassis is mandatory.  The engine must be in the OEM location for the body is used.  The vehicle must retain the full OEM chassis.  Wheel tubs, back-half conversions, tube chassis, etc., are prohibited. Cooling System  --  Radiators must be in the stock location and be of at least stock size. Credentials  --  All drivers must have a valid state driver’s license. Driveline  --  An OEM transmission and transfer case is mandatory.  They must have been an option on a one-ton or smaller pickups. Engine  --  The engine shall be stock appearing, OEM make- specific compression ignition engine. Driver Restraint System  --   The OEM restraint system is mandatory and must be worn. Exhaust  --  The exhaust must exit rearward of the driver’s compartment.  Stacks exiting through the hood or fender well are prohibited. Fuel  --  The fuel must be pump #1/#2 diesel only.   Soy/Bio- diesel fuel is permitted.  Off-road diesel fuel is prohibited. Nitrous Oxide  --  Is PROHIBITED along with other oxygen extenders and the use of PROPANE is also PROHIBITED.  All system components MUST be removed. Fuel Injection Pump  --  The fuel injection pump is limited to a stock-appearing, OEM engine model-specific pump only.  The use of multiple high-pressure common-rail pumps is prohibited.  Powerstroke engines with a single factory turbo may utilize a second HPOP.  Pumps from different years in the same engine model may be interchanged. Fuel System  --  The OEM fuel tank is mandatory and must be used.  Racing fuel cells are prohibited and must be removed from the vehicle. Harmonic Balancer --  All engines turning 4500 RPM and higher must be equipped with a harmonic balancer or damper meeting SFI Spec 18.1. Hitch  --  The hitch must be a receiver-style hitch; reinforcements are permitted.  Reinforcements must not extend forward of the centerline of the rear axle or to the axle housing itself.  Trick hitches are prohibited.  The hooking point must be the rear-most point on the vehicle and must be rearward of the stock location of the tailgate.  The hitch must be horizontal to the ground and stationary in all directions.  Bumpers may be notched or removed.  The hitch’s height from the ground may not exceed 26 inches on 4wd units and 30 inches on 2wd units.  The hooking point must have a minimum 3.750-inch inside diameter opening for the sled hook.  The hooking point will be measured to the center of the clevis loop. Interior  --  A complete interior, including dashboard, door panels, headliner, etc., is mandatory.  Two matching front sears are mandatory.  Aftermarket seats are permitted; they must be fully upholstered.  All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and be operative.  The use of hand-throttle controls is prohibited. Rear End  --  Non-OEM rear-end housings are prohibited.  It must have been an option on a one-ton or smaller pickup.  Rear axle bolts must be covered by a cap or shield. Steering  --  The vehicle must retain the full, original OEM steering gear.  The vehicle must retain the original OEM power steering assistance, if it was so equipped.  Additional stabilizers are permitted.  Non-OEM power assist methods are prohibited. Street Equipment  --  Complete headlight and taillight assemblies (all) are mandatory and must be operative.  Complete OEM windshield and windows are mandatory.  Windows must be operative per factory specifications; that is, they must open and close via OEM electrical or mechanical means.  Suspension: Front  --  The upper mounting point for strut assemblies must be in the factory location.  Adjustable caster/camber pillow ball mounts are permitted.  The lower control arm may be strengthened provided factory-mounting points to chassis are maintained.  The lower mounting point for the strut assembly may be modified for improved caster or camber.  Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Suspension: Rear  --  An OEM-style suspension is mandatory.  Lowering or raising the vehicle height with suspension modifications is permitted.    All OEM suspension mounting points must be retained and used.  Sway bars, limit straps, and camber kits are permitted.  The rear suspension must maintain a full compression shock travel.  All rear suspensions must use at least one working shock absorber per wheel.  No Limiting blocks or lock out. Tires  --  The tires must be DOT street tires.  Cut tires are prohibited.  Dual wheels are permitted only on trucks with a specific OEM bed designed for this application.  Maximum tire width for dual wheels is 14 inch total. Transmission: Automatic  --  Non-OEM transmissions are prohibited.  Aftermarket torque converters, valve bodies and internal components are permitted.  Transmission brakes are prohibited.  Any non-OEM floor-mounted automatic transmission shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse gear.  A functional neutral safety switch is mandatory.  All transmission lines must be metallic or high- pressure-type hose.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled accordingly.  A blanket-type shield is permitted; it must be appropriately labeled as meeting SFI Spec 4.1 and it must extend from the rear of the block to the front of tail housing with a minimum 6 inch overlap where it is fastened.  All non-blanket type shields must incorporate two (or one, per manufacturer’s instructions) 3/4 inch by 1/8 inch straps that bolt to the shield on each side and pass under the transmission pan unless the transmission pan is labeled as meeting SFI Spec 4.1.  All vehicles with engines running 4500 RPM or more and using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1 and be covered by a flex plate shield meeting SFI Spec 30.1. Transmission: Manual  --  Non-OEM transmissions are prohibited.  Aftermarket internal components are permitted.  A clutch meeting minimum SFI Spec 1.1 or 1.2 is mandatory on all vehicles with engines running 4500 RPM or more.  All manual transmissions must be clutch assisted.  Sequential shifters are prohibited.  All vehicles with engines running 4500 RPM or more and equipped with a manual transmission must have a flywheel shield labeled as meeting minimum SFI Spec 6.3 or greater.  Applications for  which an SFI Spec Flywheel shield is not available may use a properly attached SFI 4.1 or 4.2 blanket that completely covers the bell housing; it must be attached to the block and extend rearward to the transmission with a minimum 6 inch overlap where it is fastened. Transfer Case  --  Non-OEM transfer case are prohibited.  The transfer case must have been an option on a one-ton or smaller pickup truck. Tuner  --  A single tuner (Edge, Bully Dog, etc.) is permitted. Turbocharger  --  The turbocharger is limited to a stock- appearing, OEM/Factory make-specific charger only.  Turbochargers from different years in the same make may be interchanged, no adapters to accept other model turbo.  6.4 liter Powerstroke engines may utilize the factory twin turbo configuration.  Any cut, notched or etc. of the turbo wheels/blades will result in a disqualification.  Turbo housing must be unaltered OEM/Factory with no provision made for extra air flow and/or machining to allow larger turbo wheel in the housing.  No busing of the inducer is permitted.  Aftermarket wheels in a stock unaltered housing are permitted.  Failure to allow for turbo inspection will result in immediate disqualification.  Any truck disqualified for this reason will be required to undergo a compete super tech prior to any further completion.  Absolutely no refunds for any illegal turbo found after the class has pulled.  NOTE:  IF YOU TRUCK CONSISTENELY RUNS IN THE TOP THREE PLACES YOU WILL BE CHECKED. Water Injection  --  Water injection is prohibited.  All system components must be removed from the truck. Wheelbase  --  The vehicle must retain the original factory wheelbase and track width. NOTE:  A TEEL-TALE TACHOMETER or A COMPUTER DATA LOG MAY BE REQUIRED ON THE TRUCK (AT THE OWNER’S EXPENSE) IN ORDER TO PROVE THAT THE ENGINE IS RUNNING UNDER 4500 RPM AND THAT THE SAFETY EQUIPMENT IS NOT NECESSARY ON THAT TRUCK. E V E N T   O P E R A T I O N DRIVER’S WINDOW MUST BE ROLLED COMPLETELY UP WHILE COMPETING.  OTHER WINDOWS ON THE TRUCK MAY BE LOWERED.  PASSENGERS ARE NOT PERMITTED IN THE TRUCK AT ANY TIME EITHER IN THE PITS OR ON THE TRACK. (Back To Top)    
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