Made by Competition Engineering this seat back brace is designed to be used with non-FIA aluminum racing seats. These braces use a 3 in. by 6 in. backing plate for attachment. They can also be used on FIA approved seats to provide additional support. Features a locking collar to allow the seat to move back and forth. No welding is required for installation. Attach to the safest part of a vehicle — a well-built roll cage — to keep your seat firmly place!