BMW F8X M3/M4 CARBON FIBER REAR DIFFUSER FINAL EDITION

The F80 M3 and F82 M4 deserve a proper send-off, and we're not leaving anything on the table. The Final Edition Rear Diffuser is the second iteration of our F8X M3/M4 rear diffuser, refined from everything we learned building the original and designed to be the definitive version for both chassis.

The Final Edition Rear Diffuser is a 3-piece carbon fiber assembly: a center diffuser flanked by two winglets. The center piece extends carbon fiber outward into the lower corners of the bumper, and each winglet continues along the bottom edge of the bumper toward the rear wheel. The result is a fuller, more aggressive look from behind.

Crafted from clear coated carbon fiber and designed to fit the F80 M3 and F82 M4 without modification to the factory rear bumper. Installs with 3M double sided tape, 3M Dual Lock tape, and factory bolts.

Paired with the rest of the Final Edition kit, the F80 M3 full setup adds +516N (116 lbs) of downforce and just +19N (4 lbs) of drag over stock.

The F82 M4 full setup adds +257N (58 lbs) of downforce and just +63N (14 lbs) of drag over stock. Both make it a functional aero package as much as a visual one.