Competition Engineering seat back braces stem from the reality that in a fraction of a second, anything can happen while racing. By tying your seat into the sturdy roll cage, it'll stay in place under heavy acceleration, braking, cornering, and damaging situations. These braces use a 3 in. by 6 in. backing plate for attachment to the back of non FIA-approved seats; they can also be used on approved seats for added support. The braces feature a locking collar to allow the seat to move back and forth, and no welding is required for installation. A well-built roll cage is the safest part of a vehicle--keep your seat attached the frame with a Competition Engineering back brace kit.