Millway Motorsport brake caliper adapter to use 996 Porsche Boxster S calipers and similar on the rear of your E46 M3, using original discs.

Made from steel and milled to be as lightweight as possible. Includes 12.9 grade hardware, priced per axle set.

For fitting instructions, Millway Adjustable Camber Plate, Millway Adjustable Arm, Millway Solid Aluminium Bushing and other Millway parts manuals, please see here.