The Alcon rear race kit for BMW E90/E92 M3 installs 6-piston calipers with 355x28mm rotors and an anodized finish, delivering a rear-specific braking solution for E90/E92 M3 competition applications. This kit provides the higher piston count and rotor sizing suited to track-oriented rear braking requirements on the listed M3 models.
Alcon BMW E90/E92 M3 6 Piston 355x28mm Rear Race Kit - Anodized