Below you will find a list of Specifications as well as Manufactures for Tractor Pulling related products. Click on a link and download the file that pertains to what you are looking for. Certification that products meet SFI minimum standards is made by the product manufacturer. Products and Companies/Manufacturers are NOT certified, endorsed, or approved by the SFI Foundation under this Program. Learn more about the SFI Spec Program.
The below list includes Tractor Roll Cage Spec documents which can be purchased from SFI for US$41.00 each. To order, call SFI at (858) 451-8868 or Download an SFI Chassis Spec Order Form
Misc. Tractor Pulling
Tractor Blankets
SFI Spec 4.2 | Manufacturers
Spec Effective Date: Oct. 26, 1994
Containment Bellhousing for SFI 1.1 & 1.2 Clutch Assemblies for limited normally aspirated applications, and forced induction applications with torque converters
SFI Spec 6.1 | Manufacturers
Spec Effective Date / Revision: April 9, 2026
Passenger Car Replacement Containment Bellhousings with Adjustable Clutch Window for SFI 1.1 & 1.2 Clutch Assemblies for limited normally aspirated applications, and forced induction applications with torque converters
SFI Spec 6.1W | Manufacturers
Spec Effective Date / Revision: April 9, 2026
Containment Bellhousing for SFI 1.3 & 1.4 Clutch Assemblies for Nitro-methane, Top Alcohol, and heavy-duty tractor applications
SFI Spec 6.2 | Manufacturers
Spec Effective Date / Revision: April 9, 2026
Containment Bellhousing for SFI Clutch Assemblies for supercharged and nitrous-oxide applications
SFI Spec 6.3 | Manufacturers
Spec Effective Date / Revision: April 9, 2026
Pulling and Diesel Drag Racing Bellhousing
SFI Spec 6.4 | Manufacturers
Spec Effective Date / Revision: May 13, 2026
Driver Roll Cage for Use on 7,000 to 10,000 lbs. Tractors
SFI Spec 47.1A | Spec Effective Date: July 24, 2023 | Manufacturer
Driver Roll Cage for Use on Tractors, Less Than 6,300 lbs.
SFI Spec 47.2A | Spec Effective Date: July 24, 2023 | Manufacturer
Driver Roll Cage for Use on “Mini-Rod” Tractors, Less Than 2,050 lbs.
SFI Spec 47.3A | Spec Effective Date: July 24, 2023 | Manufacturer
