Outlaw Truck and Tractor Pulling Association Forms New Partnership with National Sled Pullers Association

The Outlaw Truck and Tractor Pulling Association announces that they have formed a new partnership with the National Sled Pullers Association (NSPA) based out of Colorado. The NSPA has partnered with the Outlaw Heartland division to form the new NSPA-Heartland Division of the Outlaw Truck and Tractor Pulling Association. This partnership will allow the OTTPA to grow the sport of tractor pulling in states of Colorado, Wyoming and western Nebraska.

The new OTTPA NSPA-Heartland Division will be led by Jarod and Nicole Ley and their children, daughter Shelbie and son Kyle who have previously owned and ran the NSPA. Jarod, Nicole and family have been involved in the pulling world since 1996. They started with the Colorado Truck & Tractor Pullers Association and then helped start and build NSPA in 2008. Since then, the organization has grown under their leadership.

“The Leys and the NSPA will be valuable additions to the OTTPA and the Heartland series,” said Kyle Petsch, COO of OTTPA. “They have created and run an outstanding organization with NSPA, and their expertise will make them excellent leaders for the new OTTPA NSPA-Heartland Division. I look forward to working with them to grow the sport of truck and tractor pulling.”

This new partnership coincides with the transition of leadership in the Heartland division. Greg Lussetto, who has served as the Heartland Series Director since its inception within OTTPA, has decided to step down. OTTPA extends its deepest gratitude to Greg and his family for their dedication and contributions to the Heartland series and the sport.

For more information about becoming a member of the OTTPA NSPA-Heartland Division or to book an event, please contact:

Jarod Ley
Phone: 970-396-8447
jarodley77@gmail.com

Nicole Ley
Phone: 970-371-1482
nicoleley76@gmail.com
nspapulling1@gmail.com

02/17/2025 – For the 2025 Outlaw Truck and Tractor Pulling Association season the following rule update and clarification will apply for turbochargers in all classes:

 Affected Classes:

• All Classes

 Affected Rule:

• In 2024 OTTPA Rule Book, Safety Rules, Page 17, Rule #29
• Any intake wheel that is not enclosed into the hood that is easily accessible must have a containment system to prevent the intake wheel from discharging forward.

New Rule in 2025 Rule Book:

• General Safety Rules, Page 21, Rule #11.11.8
• Moved to a new rule number and updated
• All turbocharged vehicles with the air inlet on the turbocharger not in the engine compartment (under the hood, behind the side shields and behind the grill) must have a cross in front of the compressor wheel. Cover (3/8” star pattern of billet) will be V-banded between air shut off and compressor cover.

Download PDF of Turbo Intake Containment Press Release

01/13/2025 – For the 2025 Outlaw Truck and Tractor Pulling Association season the following rules will apply for the turbochargers in the following classes:

Affected Classes:

• Limited Pro Stock Tractor
• 540 Light Pro Stock Tractor
• Light Limited Pro Stock Tractor

New Turbo Checking Procedure:

• 2-point plug with one inch opening and a 30-degree face will verify compliance.
• Plug must fit the bore and avoid contact with compressor blades.

NOTE: Measurement devices to make sure turbo is legal can be purchased by contacting the OTTPA Competition Director.

2025 Limited Pro Stock Turbocharger – Rule #26.4:

1. Allow any 4.1 smooth bore turbo with maximum 4.5 exhaust wheel.
2. Intake and exhaust wheel must protrude 1/8-inch into the housing.
3. No map width enhancement (MWE) is allowed.
4. Exhaust must exit through max 4.5” bore in housing.
5. Intake must be smooth with no slots or grooves to allow extra air.
6. Compressor wheel must enter bore by 1.8” with a minimum diameter of 4.0 inches.
7. Refer to rule 20.6.3 “Tractor General: Turbochargers” for inspection process.

 

2025 540 Light Pro Stock Turbocharger – Rule #27.4:

1. Any turbo allowed, with 4.5” max exhaust wheel
2. Exhaust Wheel must protrude 1/8” into housing
3. All exhaust to exit through max 4.5” bore in housing.
4. Maximum 5-inch intake housing.
5. Refer to rule 20.6.3 “Tractor General: Turbochargers” for inspection process

 

2025 Light Limited Pro Stock Turbocharger – Rule #24.5

1. Any 3×4 smooth bore turbo
2. No map width enhancement (MWE) allowed
3. Intake and exhaust wheel must protrude into housing 1/8”
4. Refer to rule 20.6.3 “Tractor General: Turbochargers” for inspection process

Download PDF of Rules & Enforcement Procedures

The following are the rule changes and updates that will go into effect for the 2025 pulling season. All changes have been updated within the 2025 OTTPA Rule Book. It is recommended that all competitors review the 2025 Rule Book. The rule book has had significant organization, layout, and format changes as well as many grammatical changes and clarifications made on rules. Because of this, if you believe that something is not stated correctly, or that it is different from the 2024 rule book and should not be please contact Kyle Petsch at kyle@outlawpulling.com.

• Download Rule Update PDF
• Download 2025 OTTPA Rule Book

General Rules:

Tire Pressure Adjustment Clarification – Rule #9.4.4 – .5

• Air pressure in tires and/or air suspensions should be set to approximate settings to be used on the track before the vehicle crosses the scale. If air pressure needs to be changed, it is recommended that a tech official, the class representative, or a person designated by the class rep oversees the change to confirm that the hitch height is not over the maximum for the class.
• Anyone who is suspected of changing air pressure in tires or suspension will be subject to having their hitch remeasured by a tech official. If the hitch height is found to be illegal, they will lose points and money for that event.

General Safety Rules:

Turbo Intake Containment Device Update – Rule #11.11.8

• All turbocharged vehicles with the air inlet on the turbocharger not in the engine compartment (under the hood, behind the side shields and behind the grill) must have a cross in front of the compressor wheel. Cover (3/8” star pattern of billet) will be V-banded between air shut off and compressor cover.

Pro-Stock 4×4 Truck Rules:

Maximum Wheel Width – Rule #13.5.2

• Maximum 12-inch wheel width.

Airbag Front Suspension – Rule #13.5.7

• Front airbag suspension is allowed and cannot be controlled from inside the cab.

2.6 Diesel Truck Rules:

Intake and Turbo Blankets – Rule #15.1.4

• This is a new rule that was added for safety.
• Exhaust manifold and exhaust turbo blankets are required.

3.0 Diesel Truck Rules:

Intake and Turbo Blankets – Rule #14.1.3

• This is a new rule that was added for safety.
• Exhaust manifold and exhaust turbo blankets are required.

Modified 4×4 Truck Rules:

Class Weight – Rule #16.1.6

• MOD 4WD vehicles will compete at a maximum weight of 6,350 lbs.

Windshields Not Required – Rule #16.3.4.d

• Windshields are recommended but not required. If you don’t have a windshield, it is recommended that you have your face shield down on your helmet.

Hitch Measuring Process – Rule #16.2.1

• When measuring the hitch, light pressure may be applied to a tire that is not touching the ground to have it make contact with the ground. This will allow for a more accurately measured hitch height.

Tractor General Rules:

Adding Material to Ends of Cylinder Heads – Rule #20.7.2

• Cylinder head must retain OEM (Length/Width/Height) for engine application.
  1. Exception: 1.5 inches can be added to the front and back end of the head for tie-down purposes only.

Turbocharger Checking Procedure for LPS, 540 Light Pro, and LLP classes – Rule #20.6.2

• For the LPS, 540 Light Pro, and LLP classes the following will be used to check the legality of the turbos in use:
  1. 2-point plug with one inch opening and a 30-degree face will verify compliance.
  2. Plug must fit the bore and avoid contact with compressor blades.

NOTE: Measurement devices to make sure turbo is legal can be purchased by contacting the OTTPA Competition Director.

Light Limited Modified Tractor Rules:

Ag Engine Diesel Cubic Inch Limitation – Rule #21.3.7.a

• Diesel fuel engine using a 4.1 turbocharger with a maximum of 640 CID.

Turbo Rule Update – Rule #21.3.7.d

• Ag or industrial diesel limited to 4.1” smooth bore with maximum 4.5” exhaust wheel. Intake wheel must protrude no more or less than 1/8-inch into housing; exhaust wheel must protrude 1/8” into housing, no map width enhancement (MWE) allowed, exhaust must exit through max 4.5” bore in housing.

Allowed Engine Combinations – V8 & Turbine – Rule #21.3.9.b

• One Lycoming T53 L-13 turbine and a naturally aspirated wedge head style automotive engine with a maximum of 370 CID at 6000 lbs.

Modified Tractor Rules:

New Engine Combination – Rule #22.4.13

• Three (3) Big Block Ford engines with a maximum 2.350” intake valve in A-460 heads, limited to 60% overdrive with a maximum 8-71 supercharger, 650 cubic inch limit.

Turbine Engine Combination Update – Rule #22.4.16.b

• Removed statement about adjustment of horsepower after the pull in Whitewright.

Updated Two Engine with Turbo Combination – Rule #22.4.7

• Two (2) automotive type engines with maximum 2 turbos per engine, no Hemi, Pontiac, Oldsmobile, Big Chief or Big Duke style heads, 650 cubic inch limit per engine.
  1. Turbos limited to 1 per bank, non-staged, 88mm compressor inducer & 103mm exhaust turbine exducer. Intake and exhaust wheels must protrude 1/8” into housings.
  2. EFI is allowed.

3200 RPM Super-Field Tractor Rules:

Rules Locked for 3 Years – Rule #23.1.1

• Rules are locked and will be the same for the 2025, 2026 and 2027 pulling seasons.

Light Limited Pro Stock Tractor Rules:

Recast Heads Allowed to Run for Points – Rule #24.4.1

• Any cast or manufactured cylinder head will be accepted.

Deck Plates Allowed to Run for Points – Rule #24.3.6

• Deck plates are allowed.

Over 48 Lug Tires No Points – Rule #24.2.5

• Must use tires with 48 lugs or less to run for points. Tractors utilizing tires with more than 48 lugs can run for purse only.

Limited Pro Stock Tractor Rules:

Clarification of Turbocharger Rule – Rule #26.4

1. Allow any 4.1 smooth bore turbo with maximum 4.5 exhaust wheel.
2. Intake and exhaust wheel must protrude 1/8-inch into the housing.
3. No map width enhancement (MWE) is allowed.
4. Exhaust must exit through max 4.5” bore in housing.
5. Intake must be smooth with no slots or grooves to allow extra air.
6. Compressor wheel must enter bore by 1.8” with a minimum diameter of 4.0 inches.
7. Refer to rule 20.6.3 “Tractor General: Turbochargers” for inspection process.

Pro Stock Tractor Rules:

Turbocharger Must be Sealed – Rule #28.4.2

• Turbo must contain a seal that was installed by Wimer Fuel Injection and Turbo.

Light Super Stock Ag Tractor Rules:

1” Spacer Plate Allowed for 4010 Transmission/Rear End Housings – Rule #30.2.3

• John Deere tractors that run 4010 transmission/rear end housings can run a 1″ spacer plate to match length of a 4020 transmission/rearend housing.

Outboard Planetaries only on Tractors From the Factory – Rule #30.2.4

• No tractor can run outboard planetaries on tractors that were not offered from the factory with outboard planetaries.

Clarification on Unnecessary Holes Cut or Drilled – Rule #30.2.1

• All Light Super Stock tractors must have OEM cast engine, clutch/transmission housing, and rear end housing, axle housings bolted together with no unnecessary holes cut or drilled. No aluminum replacements.