If you are looking to upgrade the braking on your E46 M3, replacing your rear calipers for Brembos from a Porsche 996 is a great option, the only problem is getting them to fit! Creations Motorsport has the solution with their high tensile SG strength rear caliper adapter brackets. Included with high strength stainless steel mounting hardware, these nearly indestructible brackets will give you the ability to upgrade to rear calipers that offer a much higher clamping force, bringing your car to a screeching halt.

These adapters are designed to let you use rear M3 328mm x 20mm rotors - part number: 34212229379 (See ES240362)

Part Numbers for the Porsche Calipers: 996.352.421 & 996.352.422