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Injectors & Related Items
Water Meth Inj Kits
Thoroughbred Diesel has been your online performance headquarters since 2002. We know how to get the most performance out of your pickup truck and offer all of today's most popular diesel performance products.
Gaskets & Seals
Starters & Alternators
Thoroughbred Diesel offers OEM and diesel stock parts for your diesel pickup truck. At Thoroughbred Diesel, you can
buy stock diesel replacement parts such as injectors, fuel pumps, ball joints,
track bars, turbos, and more for your diesel truck.
Diesel Tips Shirts
Show your support with a Thoroughbred Diesel t-shirt, sweatshirt, or sticker decal.
Floor Mats and Liners
Locking Fuel Doors
Spare Tire Carriers
Make heads turn with custom truck accessories from Thoroughbred Diesel.
3 Runs per entry. The run that yields the highest combined horsepower and torque numbers will be
used as your entry into the competition. You may not select a run with a lower yield in order to remain
in a preferred class. A truck may only have one entry per class. If a truck breaks out of a class it cannot
re-enter back into that class. A truck may rebuy into a class but only the highest combined number in
that class will be applied. A truck cannot place more than once per class.
Example: A truck in Work Stock class makes 651 HP. Their combined numbers would be bumped into the
Limited Stock class. That person could purchase another entry into the Limited stock class and attempt a
better result in the limited stock class.
Winners in each class will be determined by utilizing the highest combined horsepower and torque
numbers from a single run.
The Work Stock (WS) class is designed for daily-driven, on-the-road pickup trucks (full-bodied diesel
pickup trucks). Valid DOT registration and license plates 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
Engine: The engine is limited to a stock-appearing, OEM compression ignition engine available from the
factory in a one ton or smaller truck.
Driveline: An OEM transmission and transfer case are mandatory. They must have been an option for a
one-ton or smaller pickup.
Tires: Racing Slicks are prohibited
Water Meth, Propane, and Nitrous are PROHIBITED.
Power Bracket – Work Stock trucks must fall within the bracket range of 1 HP to 650 HP and a total
combined horsepower and torque number less than 1950. Any truck that exceeds the maximum
horsepower or maximum combined number will have their numbers bumped into the appropriate
bracket class. Example: A 651 horsepower truck will have their numbers transferred from the Work
Stock class to the Limited Stock class. Or a truck with 620 HP and 1350 TQ will be bumped into the
Limited Stock class.
The Limited Stock class is designed for street drivable trucks with a wide variety of performance
upgrades. Valid DOT registration and plates are mandatory.
Power Bracket – Limited Stock trucks must fall within the bracket range of 651 HP to 900 HP and a total
combined horsepower and torque number less than 2700. Any truck that exceeds the maximum
horsepower or maximum combined number will have their numbers bumped into the appropriate
bracket class. Example: A 901 horsepower truck will have their numbers transferred from the Limited
Stock class to the Unlimited class. Or a truck with 800 HP and 2000 TQ will be bumped into the
Ballast is permitted. Front hanging weights are allowed, not to exceed 60 inches forward of the center of the front axle. This will be measured from center of front wheels to end of weight assembly. Ballast may be added in the bed of the truck.
The Batteries must be securely mounted can be in anywhere, but if in cab must be covered completely.
The body must be the OEM truck body. Metal aftermarket hoods are permitted. Fiberglass hoods and roll pans only are permitted. All Fiberglass hoods must be shielded on the underneath side with sheet metal or aluminum skin a minimum of .060 thick. The hood must be closed and securely latched while the truck is hooked to the sled. The complete OEM firewall and floor pan is recommended.
Front wheel hydraulic functional brakes are mandatory.
The OEM chassis is mandatory. The engine must be in the OEM location for the body used. The vehicle must retain the OEM chassis. Wheel tubs, back half conversions, tube chassis, etc, are prohibited.
All drivers must have a valid state driver’s license and full fire suit, which includes helmet. Seat Belt/restraint system must be worn.
An OEM transmission and transfer case are mandatory. They must have been an option on a one ton or smaller pickup. All trucks must have at least six-inch-wide u-joint shields around the rear u-joint constructed of at least ¼ inch steel or 3/8-inch aluminum that will safely contain the u-joint and the end of the rear shaft. All shields must be securely mounted to the vehicle. 26 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.
The engine is limited to a stock-appearing. 444 Cubic Inch. Engine and transmissions can be interchanged between Dodge, Ford, and GM as long as they came in a 1-ton truck or less from the factory. Complete engine must have stock appearance except where otherwise noted in these rules. Aftermarket intake manifolds are allowed. NO DECK PLATES of any kind.
All vehicles must be equipped to direct exhaust upward. The exhaust must exit rearward of the driver’s compartment or through the hood. Stacks’ exiting through the fender well are prohibited. Two (2) 3/8 inch diameter bolts must be installed through exhaust pipe in a cross pattern within one (1) inch of each other and as close to the turbo as possible. This will be teched. Bolt heads welded to the pipe or sheet metal screws to mimic this will be grounds for disqualification.
Fire Extinguisher System:
A fire extinguisher system is permitted. It must be securely mounted. A complete OEM firewall is mandatory.
Diesel fuel ONLY
Fuel Injection Pump:
The fuel injection pump is limited to cylinder number specific (I.e. 6 cylinder pump on a 6 cylinder motor). Dual high pressure common rail fuel pumps or HPOPs are permitted. P3000 or P7100 only
Ag governors are allowed. No Sigma or 12 cylinder pumps allowed. A 3 way dump valve must be installed close to pump on all manual pumps and operated from the drivers compartment. Hand throttles may be used and must be spring loaded to return to idle when released. P3000 or P7100 only
on P Pump trucks. No 8600 pumps. 14. Hook point must be no closer than 44” of centerline of rear axle, hitch height maximum of 26”, with a minimum of a 3.75” X 3.0” opening. Hitch point must be easily accessed. No “trick” type hitches permitted.
All engines turning more than 4500 RPM must be equipped with a harmonic balancer or dampener meeting SFI Spec 18.1.
The hitch may be a receiver- style hitch or a custom drawbar type. Reinforcements are permitted. Reinforcements must not extend forward of the center line of the rear axle and must remain inside the frame rails. 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 stationary in all directions. Bumper may be notched or removed. The hitch’s height from the ground may not exceed 26 inches. The hooking point must have a minimum of 3 inch by 3 3⁄4 inch inside opening for the sled hook. The hooking point must be a minimum of 44 inches from the center of the rear axle, to the end of the hole where the hook touches metal to be pulled from, this is the hooking point. 16. Hitch must not exceed a maximum of 25-degree angle from pivot point to hook point.
Factory style or aftermarket intercoolers are allowed. Water to air intercoolers allowed. Ice and water must be weighed at the time of crossing the scales.
All trucks are required to have kill switch located on the back of the truck, located near the hooking point. On trucks with an electric injection fuel pumps it must have an electric shut off or disconnect for the injection pump on the back of the truck for trucks with manual injection pumps they must have an air guillotine of the spring loaded type, no butterfly type to kill the air intake to the engine. It is recommended to have an air shut off on all trucks. Kill switch failure will result in disqualification. If during competition the kill switch slides loose or falls out distance will be measured. Securing the kill switch is the driver’s responsibility.
Nitrous Oxide is prohibited. No other oxygen extenders are allowed. All system components must be removed from the truck.
Propane is prohibited. All system components must be removed from the truck.
All drivers must wear a helmet, and a SFI 3.2a approved fire jacket and fire pants, and leather shoes.
The vehicle may retain the original OEM steering gear or use an electric over hydraulic steering. Additional stabilizers are permitted.
Suspension - Front:
The factory suspension configuration must be retained. Modifications to the front suspension that would alter the original location (I.e. moving it forward or backward) is not permitted. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Traction bars and devices are permitted. Air shocks are prohibited.
The tires must be DOT street tires, with a tire limit size of 35 inches. Cut tires are prohibited.
Transmission - Automatic:
Non - OEM transmissions are prohibited. The transmission must have been an option for a one ton or smaller truck. Aftermarket torque converters, valve bodies and internal components are permitted. Transmission brakes are prohibited. Any non -OEM floor mounted automatic shifter must be equipped with a spring-loaded positive reverse lockout device to prevent the shifter from accidentally being put into reverse. A functional neutral safety switch is mandatory. Vehicle must not start in gear. All transmission lines must be metallic or high pressure type hose. All automatic transmissions must be equipped with a transmission shield meeting SFI Spec 4.1 and must be labeled accordingly. A blanket type shield must be used and appropriately labeled as meeting SFI Spec 4.1 and it must be from the rear of the engine block and extend rearward onto the transmission, with a minimum of six (6) inch overlap where it is fastened. All vehicles using an automatic transmission must be equipped with a flex plate meeting SFI Spec 29.1.
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. All manual transmissions must be clutch assisted. Sequential shifters are prohibited. All vehicles equipped with 29 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.
The vehicle is limited to a 2.6 inducer bore single turbocharger. The compressor wheel must protrude into a 2.6” bore for 1/8”. The inlet will be measured using a 2/605 inch plug the plug must not be able to enter the inducer bore. A stock map width enhancement (MWE) groove must be inside neck are where intake cover is measured. No MWE groove will be allowed that has a width greater than .200”. All provisions allowing air into the wheel other than via the bore and the MWE groove are prohibited. The vehicle driver will be responsible for making compressor wheel accessible for tech personal to measure bore and be able to inspect compressor wheel.
Water injection is prohibited. All system components must be removed from truck.
The vehicle must retain the original factory wheel base and track width. Cab and chassis trucks may not exceed 172 inch center to center of axles. Front dual-wheel spacers may be used only with accompanying positive-offset dually style wheels.
All vehicles must cross scales and enter the track under their own power. All 2.6 Trucks with open driveline, truck wheel base must not exceed 158 inches.
The Unlimited class is for competition vehicles.
Water Meth, Propane, and Nitrous are ALLOWED. Fogging is prohibited.
Tires: Racing Slicks are prohibited
Power Bracket – Unlimited trucks will fall above 901 HP or a total combined horsepower and torque
number greater than 2701. There is no maximum horsepower or combined number for the Unlimited
All sled pull rules will follow the Battle of the Bluegrass Pulling Series guidelines. Those can be found at bluegrasspulling.com/rules/