Unless otherwise noted, please refer to the latest NTPA class rules.

Safety

• Roll cages need to be inspected by the end of 2020 season and tagged.
• Visor down on helmet is optional
• Neck collar, head sock, gloves, and fire shoes are REQUIRED for ALL classes except Farm Stock
• Inner side shields- Mandatory for HF 10 & HF 12
• Windshield in PSD – optional

13500 Farm Stock

• 12 MPH
• 3000 RPM
• 4, 6, 8 cylinder motor
• One Turbo Charger any size
• Unlimited cubic inch

Super Farm

• Run PPL or NTPA Rules (Pg. 57-58) : biofuel OR intercooler 

Super Stock

• NTPA Rules (Pg. 47-51)
• Alcohol tractors weigh 6500lbs and follow the light super stock rules
• Diesels tractors weight 7000lbs and follow the heavy super stock rules

Hot Farm (10,000 lb)

• Weight 10,000 lb
• 3000 RPM
• 470 cubic inch
• Turbo 3 inch intake with no larger than .200 map ring

3.6 Pro Stock Diesel Trucks

• NTPA Rules (Pg 69-70)
• Turbo: Any 3.6 Smooth Bore or Any MWE compressor size, with limited turbine. (no part of turbine shall be larger than 3.800),  Will be checked with 3.850 ring, must slide over complete turbine and touch center section.
• Water Injection allowed
• Open floor boards allowed
• Cut tires allowed

Limited Pro 4.1

• NTPA Rules (Pg 56)