Truck Pulls



 Truck Pulls

1. No alcoholic beverages on track or in pit area. Any driver believed to be a potential safety hazard will be barred. Driver is responsible for their pit crew. Failure to observe rules will result in disqualification with no return of entry fee.
2. Pulling or towing vehicles must be operated in a safe manner at all times.
3. Helmets are highly recommended. And Seat Belts are required.
4. All weights must be securely fastened. No weights permitted in cab or under hood. No loose ballasts or bags.
5. Vehicle must start and stop on signal of track judge. No use of rear view mirrors. Pull is considered over when forward motion stops. Violators will be disqualified.
6. A 2 1/2 lb. dry powder fire extinguisher within reach of driver is required.
7. No one is allowed on track or within 25’ of track except driver, track officials & judges.
8. No pit crew member permitted on track except to start vehicle & hook vehicle to sled.
9. No one other than driver permitted in pulling vehicles.
10. Vehicle must start with tight hitch. No jerking or working of clutch after pull is started. Any violation will be disqualified.
11. Vehicle & sled must remain in boundaries during pull. Any attempt to move sled is considered measurable.
12. Contestant must pull in assigned position & within 3 minutes of sled spotting. Track officials will determine position changes if necessary.
13. Entries close at the start of class.
14. First puller is considered a “test puller” & has the option to re-pull in 3rd or last position. All decisions on re-pull must be made before vehicle leaves the track with judge’s approval. Any disqualification on 1st pull eliminates 2nd attempt. During pull-off, only one attempt is allowed to make a measurable pull.
15. Judge’s decision is final in all classes. Judge has option to re-pull all 1st pulls.
16. Rain out: A session of pulling is official if 1/2 of the advertised classes are completed. A class will be considered official when 2/3 of the vehicles have pulled. Any classes not completed for any reason will be considered a rain out. TRACK OFFICAL(S) will determine if a class is a rain out.
17. If vehicle has open top or roll bar, a helmet with face shield is required. All vehicles must have a windshield.
18. Electric fuel pumps allowed in all classes. DOT stock tires okay, no over-sized duals.
19. All vehicles will be in Park/Neutral while being hitched/unhitched.
20. All vehicles with state inspection will pull in one class unless otherwise permitted.
21. Arguing & unsportsmanlike conduct toward officials is cause for disqualification of both vehicle & driver for that day. All track official decisions are final.
22. No Nitros or Pressurized Vessels.
23. No vertical hitches allowed. Hitch must be accessible to be hooked/unhooked easily.
24. If there is a protest, it must be made by competitor of that class & be made to track officials only. Officials will decide if complaint is legitimate & if disqualification will take place.
25. All pullers pull at their own risk.
26. All trucks must have 4” or larger back-up lights or beeper.
27. All vehicles must weigh in and pass safety inspection.
28. Track officials reserve the right to re-weigh any pulling vehicle.
29. If truck has 3 consecutive wins during pulling season, with a 10% lead from 2nd place truck, then truck must move up to next class.
30. Hitch height must be 26” to the center of the hitch.
31. Hitches must have a 3” or larger hole.
32. Kill switches: U-Joint Shield must be 6” wide 1’4” steel or 3/8” aluminum, U-Joint shields required for the following classes: Small Block Street, Big Block Street, Small Block HO, Big Block HO, Open Diesel, Hot Street Diesel & 2-Wheel Drive.
33. If a competitor arrives late, said competitor will not be allowed to compete if the class has already started.
34. Boundary line will be 320’ long to start the pull, even though a full pull may only be 300”.
35. In a pull-off, each puller will hook in the order that they pulled in the original line up. No dropping of positions allowed. A floating finish will be used.
36. Rain out-A session of pulling is official if half of the advertised classes are completed. A class will be considered official when 2/3 of the vehicles have pulled. Any classes not completed for any reason will be considered a rain out. TRACK OFFICAL(S) will determine if a class is a rain out.
37. Rule Violation-Any 1st time violation will result in disqualification from that event. 2nd time violation for the same infraction will result in removal from that pulling season. Any puller suspended will not be allowed on the track or the pit area for the duration of the suspension. If vehicle is sold, vehicle will be allowed to pull, but the suspended party must not be involved with vehicle in any way.
38. Disqualifications-Out of bounds; any part of the vehicle touching the white boundary line while under green flag will be disqualified. Loss of weights or safety equipment under green flag. Loss of excessive fluid. Unsportsman like conduct. Leaving the starting line under red flag condition. Deliberate delay of pull. Excessive arguing with officials. Intoxication of any kind.
39. Safety Switch-All vehicles required to have a kill switch. Kill switch will be securely mounted to the back of the vehicle & have a 2” diameter ring to attach to the sled. A tie strap will be used during tech to show vehicles have been teched. A 1/4” hole will be used to securely hold tie strap just above the kill switch (only if tie strap is broken, decided by head track official, will competitor be given opportunity to pull again). Kill switches on diesel motors must have: air shut off must be operated from rear of vehicle. Air shut off will consist of cap or guillotine that closes off air into the engine. The cap or guideline will be spring loaded.
40. First 3 classes must be registered prior to driver’s meeting.

Truck Pulling Classes
Absolute Showroom 6,500 lbs 
Small Block Showroom 6,200 lbs
2 Wheel Drive 7,500 lbs 
Small Block Street 6,200 lbs
Big Block Showroom 6,500 lbs
Big Block Street  6,500 lbs 
Small Block High Output 6,500 lbs
Big Block High Output  6,500 lbs 
Absolute Showroom Diesel  8,000 lbs 
2.5 Street Diesel  8,000 lbs 
2.6 Street Diesel 8,000 lbs 
Hot Street Diesel 8,000 lbs
Open Diesel 8,000 lbs

Drivers meeting 15 minutes before pull at announcers stand, EVERYONE PULLING must attend!                

Absolute Showroom 6,500 LBS                                                                                                                                   
1. 100% factory vehicle.

2. PA inspection, insurance and license is required.
3. Cold air system’s are allowed.
4. No add-on’s allowed in this class.
5. Cat Back Systems are allowed.
6. Pre– Emission Dual Exhausts are allowed.                                                                                 

Showroom Trucks
Small Block 412 C.I. & less 6,200 lbs / Big Block 413 C.I. & up 6,500 lbs                                                                               
1. Three add-ons or modifications are allowed. Add-ons being aluminum intake, headers, Holley carburetors and traction bars.
2. Vehicle should look & sound like an everyday vehicle.
3. Rough idle will be considered a modification.
4. Inspection & license necessary, owners card & insurance card may be ask for.
5. Air cleaners are mandatory. Battery must be secured to truck.
6. Must pull off bumper or Reese hitch. Hitch point must be rear most part of vehicle.
7. Hitch point can be no higher than vehicle frame.
8. No heavy front bumpers or hanging weights. Snowplow rigging allowed.
9. Weights can be put securely in the bed, no weights in cab of vehicle.
10. No weights under hood. Officials may check before, during & after pull.
11. Posi-traction carriers allowed. No welded carriers or spools permitted in front or rear differential.
12. Compression ratio should be no higher than year of vehicle being pulled.
13. 10” wide rim allowed. 12” tread width allowed.
14. No use of nitrous oxide or racing fuel.
15. No suspension add-ons, helper springs or air bags. Stock springs & overloads only.                                                          
2 Wheel Drive Trucks (Gas or Diesel)
510 Cubic Inch Limit - 7,500 LBS
1. Front suspension must move up or down.
2. No differential limit.
3. No pedal steering.
4. Hitch height no more than 30” and no shorter than 27% and no longer than 36% of wheelbase.
5. Weight may not exceed 18” in front of grill.
6. No rear-end limit.
7. Any engine and transmission combo.
8. Headers coming out of hood must have 2– 3/8” cross bolts in heads spaced 1” apart.                      
Street Trucks
Small Block 412 C.I. & less 6,200 lbs / Big Block 413 C.I to 510 C.I. 6,500 LBS
1. Must have original equipment as intended by manufacturer with body, hood, fenders & bed with floor. Flatbeds are allowed.
2. No frame alterations; lengthening or shortening.
3. Must be street legal or pass PA state inspection.
4. Tire size: limit to 12” tread width & 10” rims 35” high. Must be DOT approved. Dual tires permitted but cannot exceed 12” of tread. No chains or studs or Wrangler style tires.
5. Suspension blocks & lift kits allowed. Rear suspension must have 1” in travel.
6. Factory fuel injection or turbochargers only.
7. Any battery powered ignition may be used.
8. Slipper clutches allowed. If no slipper clutch, blow proof bell or blanket required.
9. No nitrous oxide or any combustion accelerant.
10. Hitch height can be no higher than 26”. Point of break to center of axle must be at least 36% of vehicle wheel base.
11. Factory high performance heads aftermarket & exhaust manifolds allowed, cast iron only.
12. Inspection & license necessary. Owners card & insurance will be checked. An equipment check of the following will be done & must function: wipers, lights, turn signals, heater, windows & brake lights. No Lexan or Plexi in windows, must be glass.
13. DOT tires only. No cut tires allowed. Tread can be no deeper than original tread.
14. Can use pulling hitch no higher than 26” and rigid in all directions.
15. Heavy front bumpers & hanging weights allowed. Weights must be securely fastened no further from 18” from grill.
16. Must run mufflers or at least 6’ of exhaust limited to 3” diameter.
17. Fan shroud highly recommended.
18. Kill switches required—see general rules.
19. Dual plane intake permitted, aluminum or cast. Single Plane not allowed.
20. Add-ons or modifications allowed, headers, camshaft, aluminum intake, carb, Hi-PO heads, traction bars.
21. No hood modifications.
22. No aluminum heads, aftermarket or OEM.
23. No dominator carburetors.
24. Street trucks will be allowed 4 add-ons.
25. Any 429-460, 427-454, 400-440 Mopar type engine pulling in Small Black Street will be checked with a cube checker or by a physical inspection.                                                                                                  
High Output
Small Block 435 C.I. & less 6,500 lbs / Big Block 440 C.I. & up 6,500 LBS
1. No frame alterations. Frame & body must be same year & make.
2. Limit to one 4 barrel carb. High rise manifold allowed. No tunnel rams. Dual Single Plane Allowed.
3. Must have fan shroud.
4. Headers allowed.
5. Pulling hitch permitted.
6. Suspension blocking allowed. Solid suspension.
7. Internal engine changes permitted.
8. Posi or welded front ends allowed.
9. Hook height 26”. Hook point to center of axle should not be less than 27% of wheel base.
10. No wider than 10” rims. Tread width not to exceed 12 1/2” & 35 “ high.
11. Weight bracket allowed. Weights can be no further than 195” from center of back axle.
12. DOT tires only. Cut tires allowed if only cut once.
13. No Wrangler style tires, bar tires or stock car tires.
14. Drive shaft loops, U-Joint Shields & kill switches required. Kill switch must kill air & fuel. See general rules.
15. Any trucks that can’t make High Output guidelines will pull in the Outlaw Class.
16. Any driver who fails to hold position in line will forfeit their points for that class.
17. Automatic transmissions must have blanket, Standard transmissions low profile bell or blanket.
18. No pro-stock heads.
19. Must be Factory Production Block.
20. Aluminum heads are allowed.                                                                                                       
Absolute Showroom Diesel 4x4
8,000 lbs
1). This is an Open Street 4X4 Truck Class available to currently licensed owners of trucks that are legal for highway use. If your truck is street legal and is 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 a current sticker is required to be affixed to the truck. Registration papers, license plate and sticker must all match. If applicable, A current inspection sticker is required. Trucks may be hauled to the pull.
2). Weight Class is 8,000 lbs. No weight brackets or hanging weights allowed on front of vehicles. Weights must be in Truck BED area only and securely fastened or contained safely therein. No weights allowed under hood or in the wheel wells. No weights may be suspended under the body/chassis or behind panels/parts. Weight class may be increased at the option of the head official, but may not be decreased.
3). Only single turbo chargers are permitted. The turbo inducer may be no larger than 2.6” native in diameter and will be checked at the officials discretion with calipers or A plug measuring 2.650. No bushing of the inducer is permitted. Failure to allow for turbo inspection and measurement will result in immediate disqualification with no refund. Any truck disqualified for this reason will be required to undergo a complete tech inspection, including turbo measuring, prior to any further participation. Absolutely no refunds for any illegal turbo found after the pull. NOTE: If your truck runs consistently in the top three places – you will be checked! Exception: Ford 6.4 Engine.
4). All tires must carry a D.O.T. number on the sidewall. No cut, altered or sharpened tires. Trucks with dual rear wheels may enter and run in this class but tires may not extend beyond the outer edge of the factory fender well. Trucks using dual rear wheels must have a factory bed with factory fender wells. No studded tires, tires chains or any tire not Specifically intended for street use are permitted.
5). Front bumpers must be unaltered factory stock. No weighted front devices are permitted - this includes but is not limited to: Homemade bumpers, brush guards and winches. Lower brackets (only) for snow plow frames are permitted so long as no modifications that would add weight are determined. An unaltered decorative brush guard may be permitted at the option of the head official. A truck is permitted to compete without a front bumper.
6). The hitch point will be from the rear bumper only or from a “Reese Type” hitch on a level plane with the point of attachment to the trucks frame behind the pumpkin of the rear end. No other types of hitches are permitted. Hitch point may not be more than 26" from ground. Hitch point must be horizontal – parallel to the ground. No angled, lever, pivot, axis or other types of ‘trick’ hitches are allowed and the hitch must be stationary in all directions. The hook point must be the furthest point to the back of the truck. Hook point must be past the bed of the truck if there is no bumper, or past the end of the bumper. Shortening of the bed in order to shorten the hook point is not permitted. Each truck driver must supply a twisted clevis with a hooking hole a minimum of 3.5” across.
7). No aluminum engine blocks are permitted unless O.E.M. NO open headers will be allowed. Pump diesel is the primary fuel permitted. Absolutely no alcohol, nitrous oxide, propane or other oxygen extenders. Headers are approved. Approved cross bolts - nearest to the charger are required if no muffler is used. No superchargers are allowed. Engine swaps between manufacturers are not permitted. Engine must have been available in 1 ton or less production truck.
8). Exhaust may not exit to the side of the vehicle (toward the grandstand area) and may not exit straight down toward the track. Turnouts are permitted so long as approved cross bolts are in place within the exhaust system.
9). Duallies using gasoline as fuel and/or a street licensed heavy gasoline truck that cannot make weight for the street licensed gasoline class may enter with permission of the head official. This is a courtesy extended to local competitors that want the opportunity to participate in their home town event and is not to be construed as opening the class to gasoline trucks.
10). Suspension must have a minimum of 2 inches of downward movement at all times. No blocks are allowed between axle housing and truck frame that would restrict the necessary 2 inches of movement. Lift kits are acceptable. No solid suspensions are allowed.
11). 265 Cross Section Allowed (Maximum) .
12). Truck must be in stock appearance. Floor in bed must be solid. The wheelbase may not be changed from original manufacturer. Wooden flatbeds are permitted with single rear wheels.
13). Transmission & transfer case must be O.E.M. and available in one ton (or smaller) pick-up trucks.
14). Driver’s window must be rolled completely up while competing. Drivers are reqired to wear a seatbelt or shoulder harness when hooked to the sled. No passengers
15). Must have OEM Turbo and/or Blower.
If vehicle has 3 consecutive wins, with a 10% lead from 2nd place vehicle, then vehicle must move up to next class.                                                                                                                                                     
2.5 Street Diesel
8,000 LBS
1. A technical safety inspection is required before pull. Fire extinguisher required in cab.
2. Must be state licensed & inspected with insurance card. No laptops allowed.
3. Tires must be DOT, no cut tires allowed.
4. Duals allowed on dually trucks only, but not oversized duals. Tires cannot touch no inner spacers or in-between wheels.
5. Turbo, must be 2.5 inlet stock housing.
6. #2 fuel only.
7. No weights allowed on front of vehicle or in cab.
8. Factory snow plow or winch brackets. No winch allowed.
9. Air bags & traction bars are allowed.
10. Exhaust must exit rear of truck, facing down or vertical stacks behind the cab.
11. Reese style hitch or bumper pulling hitches.
12. No vertical hitches. 3.5 twisted clevis or equivalent opening to allow sled hook. 26” height.
13. Traction Bars are allowed.
14. Must have stock suspension.                                                                                                                  
2.6 Street Diesel
8,000 LBS
1. A technical safety inspection is required before pull. Fire extinguisher required in cab.
2. Must be state licensed & inspected with insurance card. No laptops allowed.
3. Tires must be DOT, no cut tires allowed.
4. Duals allowed on tires that cannot touch inner or outer between wheels.
5. Turbo, must be 2.6 stock housing.
6. #2 fuel only, no water meth, lines must be inlet traceable.
7. Weights are NOT allowed. If you choose to have front weights then you will be in a 2.6 Hot Street Class
8. Factory snow plow or winch brackets. No winch allowed.
9. Air bags & traction bars are allowed, each counted as an add-on.
10. Exhaust must exit rear of truck, facing down or vertical stacks behind the cab.
11. Reese style hitch or bumper pulling hitches.
12. No vertical hitches. 3.5 twisted clevis or equivalent opening to allow sled hook. 26” height.
13. Must have kill switch installed. See general rules section.
14. Hood stacks are allowed; 3.8” cross bolts required.                                                                            
Open Diesel
8,000 LBS
1. A technical safety inspection is required before pull. Fire extinguisher required in cab.
2. Helmet,fire suit is recommended, but not required. Seat belt is required.
3. Safety blanket on automatic transmissions & blow-proof bell housing on standards turning more than 4500 RPMS is required. SFI approved flywheel/clutch on standards.
4. Crank shaft damper shield required unless a SFI damper is used.
5. Kill switch and/or air shut off is required. See general rules.
6. Drive shaft loops required.
7. U-joint guards required. See general rules.
8. All tuners, lap tops & data loggers are allowed.
9. Turbo unlimited single or 3.2 atmosphere twin.
10. Must have 2 3/8” bolts in a cross pattern as close to the turbocharger exhaust outlet as possible.
11. Hanging weights allowed no more than 60” from center of front diff.
12. Solid suspension allowed.
13. Pulling & cut tires allowed. Track width of rear tires must not exceed 102”.
14. Vertical exhaust allowed, any diameter.
15. Pulling hitches allowed, no vertical hitches. Hitch height of 26”.
16. Diesel, Nitrous, Propane, water/meth allowed.                                                                                       
Hot Street Diesel
8,000 LBS
Ballast: Ballast is permitted. Hanging weights may not extend more than 60 inches from the centerline of the front axle.
Batteries: The batteries must be securely mounted. They may not be located in the driver com-partment or forward of the radiator core support.
Block: A filled block is permitted.
Body: The body must be an OEM truck body, including the full bed floor. The body and truck bed must retain full factory 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 complete OEM floor pan is mandatory.
Brakes: Four-wheel hydraulic brakes are mandatory.
Chassis: The OEM chassis is mandatory. The engine must be in the OEM location for the body 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 vicinity of 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 op-tion on a one-ton or smaller pickup.
Driver Restraint System: The OEM restraint system is mandatory and must be worn.
Driveshaft Loops: All trucks must have a minimum of six-inch wide u-joint shields around the rear u-joint constructed of at least 1/4 inch steel or 3/8 inch aluminum that will safely con-tain the u-joint and the end of the rear shaft.
Engine: The engine block must have been available as a factory option on a one-ton or smaller pickup truck. Blocks must circulate coolant freely. Water pumps must be present, but may be powered electrically. The use of concrete or other block fillers is prohibited. All factory belt driven accessories, excluding the air conditioning compressor, must be retained and powered via the crankshaft by a standard serpentine or ‘V’ belt. Electric fans are permitted. Aftermarket radiator assemblies are permitted, but must be securely mounted in the same area as the OEM unit. NITROUS OXIDE is prohibited along with other oxygen extenders and the use of PROPANE is also prohibited. All system components MUST be removed.
Exhaust: All vehicles must be equipped to direct exhaust upward including stock exhaust systems. Hood stacks are permitted. Two 3/8 inch diameter bolts must be installed through the exhaust pipe in a cross pattern within one inch of each other as close to the turbo as is practical. Hood stack exhaust must be at least 6” above closed position of the hood.
Fire Extinguisher System: A fire extinguisher system is permitted. It must be securely mounted.
Fuel: The fuel must be pump #1/#2 diesel only. Soy/Bio-diesel fuel is permitted. Off-road diesel fuel is prohibited. Fuel tank must in O.E.M location or an approved racing type fuel cell mounted properly in the bed.
Fuel Injection Pump: The fuel injection pump is limited to a stock-appearing, OEM engine make-specific pump only. Dual high-pressure common-rail fuel pumps or HPOPs are permitted.
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. Any hitch attachments/bracing must be from frame down not from axle up. The hitch’s height from the ground may not exceed 26” & be adjustable down to 24” on 4WD units & on 2WD units hitch is 30” & be adjustable down to 28”. The hooking point must be the rear-most point on the vehicle & must be rearward of the stock location of the tailgate. Final decision of legality of all hitches resides with TRACK OFFICAL(S). Trick hitches are prohibited.
Ice Water Intercoolers: Ice water intercoolers are allowed.
Interior: A complete interior, including dashboard, door panels, headliner, etc., is mandatory. Two matching front seats are mandatory. Aftermarket seats are permitted; they must be fully upholstered. Must have full back and head rests on seats. All factory controls (lights, signals, horn, windows, wipers, etc.) must be retained and operative.
Rear End: Non-OEM rear-end housings are prohibited. The rear end must have been an option on a 1-ton or smaller truck. Rear axle bolts to 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. May use hydraulic assist but retain full operational OEM steering gear.
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. Driver’s window must be completely rolled up while competing. Other windows on truck may be lowered.
Suspension, Front: The factory suspension configuration must be retained. 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. Traction bars and devices are permitted.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Suspension, Rear: An OEM-style suspension is mandatory. Traction bars and devices are permitted; they must be bolt on only; welds are permitted for attachment to frame or axle housing. Control arms may be strengthened or replaced, provided all original mounting points are retained. Strut tower braces, lower tie bars, sway bars, limit straps, and camber kits are permitted. The rear suspension may be bolted solid to eliminate travel. All rear suspensions must use at least one working shock absorber per wheel.
Tires: The tires must be DOT street tires. Cut tires are prohibited.
Throttle: The use of a hand throttle is allowed. All throttles will have a dead man throttle that will automatically return to a closed position. Throttles will work in a forward to reverse motion, forward being open. Two springs will be required on the hand throttle and one spring on the fuel injection pump.
Transfer Case: Non-OEM transfer cases are prohibited. It must have been an option on a one-ton or smaller pick up truck.
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 six-inch overlap where it is fastened. All non-blanket-type shields must incorporate two (or one, per manufacturers 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 a Minimum 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 six inch overlap where it is fastened.
Turbocharger: The vehicle is limited to a single turbocharger; the inducer bore on the
compressor housing may be 2.6”. The inlet will be measured using a 2.65-inch plug or internal calipers. Bushing from any larger turbo size down to a 2.6 turbo is PROHIBITED. A stock map width enhancement (MWE) groove is allowed. No MWE groove will be allowed that has a width greater than 1/4 inch. All provisions allowing air to the wheel other than via the bore and the MWE groove are prohibited. 6.4 liter Powerstroke engines may utilize the factory twin-turbo configuration.
Water Injection: Water injection is prohibited. All system components must be removed from the truck.
Wheelbase: The vehicle must retain the original unaltered factory wheelbase and track width. Front dual-wheel spacers may be used only with accompanying positive-offset dually style wheels