RKP Carbon Fibre Diffuser - BMW 3 Series F80 M3 | 4 Series F82 | F83 M4Today, RKP is proud to announce our first entry into what will be an extensive F8x M3 M4 catalog. While the majority of the F8X M car is stunningly muscular, the diffuser section in particular leaves something to be desired. The flat polyurethane insert installed from BMW does not match the M3 4s aerodynamically sculpted exterior, and so was the first item RKP elected to attack. In contrast, the RKP diffuser was designed with full length fins that