A Seat Back Brace is required on all non-FIA seats by the SCCA. This strong, aluminum unit is designed to bolt to the back of your seat and clamp to the roll bar. No welding is required. The unit is fully adjustable from 2 1/2" up to 15", making it ideal for multi driver cars. It can be used with just about any seat at any angle. For added safety in side impacts, it is recommended that you use two braces.