BMS Differential Support Bracket Brace for F Chassis BMWThe BMS differential brace attaches the rear differential to the subframe allowing better launches, less wheel hop, and a more stable feeling rear chassis. Our unique one piece construction eliminates welding weak points common on similar units. No logos or markings are visible for a stealth OEM appearance. Some Drilling Required FEATURES AND BENEFITS Tightens chassis Reduces wheel hop Reduces differential bearing load All hardware included Precision