2025 9,500 Pro Farm and 10,000 Pro Farm Rules

1. Replacement Block up to 466 cubic inch or stock cubic inch are allowed provided they are bolted to the original factory cast clutch bell housing with any modification or use of adapter plates.  If the factory uses an adapter plate, you may not modified in any way. It must be the same manufacturer as the crank case, no after market heads are allowed, in line pumps can be used up to and including "P" series injection pump and number of cylinders must conform to tractor chassis being entered. 
2. A maximum limit of 3,500 RPM will be allowed. Tractors under 410 cubic inch will be allowed 4,000 RPM.
3. 9,500 and 10,000 Pro Farm Tractors Turbo will be GT42 from the box with NO Modifications. 
4. Maximum tire size is 18.4 x 42, 20.8 x 38 or 24.5 x 32, radial or bias ply on any width rim and cut tires are allowed.  Performance Pulling tires with maximum 220 inch round at 15 pounds pressure. 
5. Hook point is to be a minimum of 18 inches behind the center of rear axle and a maximum of 20 inches in height, rigid in all directions, hitching eye is to be a minimum of 3/4 inch in thickness with a opening of 3 inch wide by 3 1/2 inch deep. 
6. Turbo exhaust wheel containment cross required. Cross is to be as close as possible to the turbo exhaust wheel in the exhaust pipe. An additional set of minimum grade 5 1/2 cross bolts are also required behind the cross.     
7. Tractors using roller chain couplers to connect the engine to the transmission must enclose the said couplers 360 degrees with 5/16 inch minimum thickness steel. The inside diameter not to exceed 2 inches more than outside diameter of the coupler and to be fastened every 6 inches with a minimum 3/8 inch grade 5 bolt. 
8. A maximum dimension of 13 feet from the center of the rear axle to the furthest part of the front including weights will be allowed.  114 inch maximum wheel base from center of back axle to center of front axle.
9. Homemade front ends are allowed and will be subject to IFPA Board approval.
10. All tractors must have fenders and must cover at least 1/2 of the top of tire. 
11. All tractors must have a Dead Mans Throttle.
12. All tractors must have steel hubs and board has to approve.  
13. IFPA Board has to approve Roll Cage with a 5 point harness.   
14. Water Injection is allowed. Water must freeze and may be tested anytime. 
15. REQUIRED: Approved fire suit and helmet.  
16. RECOMMENDED:  Gloves and neck brace. 
17. Intake and Exhaust manifold's must be OEM but modification is allowed. 
18. Spacer plates allowed on intake and exhaust manifold. 
19. No Inter Coolers allowed or any type of cooling devices. 
20. Air Shut Off must be in hands reach from seat. 
21. Maximum Plunger Diameter is 13mm.  This can only be checked by protest. The pump will be sent to a pump shop with drivers choice.