Clutch slave cylinders are just like any other hydraulic pump and can be rebuilt. This is a kit to rebuild your SMG clutch slave instead of spending hundreds on a new one.
Includes Viton inner seals, high pressure pistons, Viton outer accordion boot, snap ring, lock washer.
BMW Fitments:
5 Series
E60 / E61 (04-10) > M5
6 Series
E63 / E64 (04-10) > M6