BMW E46 Brake Caliper Adapter Double Caliper Adapters for additional brake calipers for BMW e46 series cars (SEDAN/STATION WAGON/COUPÉ and E46 compact) with disc brakes on the rear axle. The set consists of two adapters for the left and right side. With this product you can connect a hydraulic handbrake in our car without disturbing the original brake system! The adapter allows you to mount all sets of original rear brake systems from the above-mentioned body versions and all engine versions (disc + caliper) Example : when mounting a 320 mm disc (e46 3.0 diesel and 3.0 petrol) both brake calipers must also come from these engine versions.