BMW S50 , S54 , M50 engine support girdle kit 6 mm steel with crmo spacers and 12,9 bolts .
Main bearing girdle provides stiffening to your engine block. Since high forces act on the entire engine, especially in tuned engines, the use of girdle plates is advisable. They prevent the crankshaft from bending too much and withstand even high torques.
Must be used with single groove keeper KPR-6S-7