Adapts 2 piston Z32 twin turbo calipers to E36M3 312x20 rear rotors on E36, E36M3, & E46 rear trailing arms (excluding E46M3 which is a separate part to use its original rotor). CNC aluminum with gold anodizing, laser logos, and 12.9 grade hardware. Pair with our reproduction calipers. Adapt to the the brake lines in the car by adding to cart the lines and fittings set we sell separately, E3646TAFBCLF. Drum parking brake can be retained on E36M3 if only using Z32 foot brake. Drum parking brake on E36 and E46 base models will not fit and must be removed.