We love the look of the OEM M-Performance Rear Diffuser BMW created for the F80 M3 and F82/3 M4, but like with most of the factory parts it was not aggressive enough and got lost in the distinctive rear bumper lines. We took styling cues from the OEM BMW piece and added our own aggressive styling to it while still maintaining a OE look. Our version is made from 100% Pre-impregnated Carbon Fiber and sits 1.5″ lower than the factory diffuser to help cover the large factory Muffler (or any aftermarket exhaust). We have also extended the upper edge to stick out from the bumper to give an prominent side view. The Optional bumper extensions can also help to transform this mild looking piece into a full length race-style diffuser. Direct fit, no additional modification required. Remove your factory piece and re-install our new lightweight CF piece today!