This is a brand new genuine BMW Carbon Fiber Black Rear Bumper Diffuser for a BMW G80 M3 Sedan and G82 G83 M4 Coupe or Convertible 2021+. This will not fit other 3 or 4 Series. It’s only for the M3/M4 unless you’re doing an M3/M4 conversion on your G20 G21 3 Series or G22 G23 4 Series. Track Page Views With. Auctiva’s FREE Counter. The item “BMW OEM G80 M3 2021+ G82 G83 M4 2021+ Carbon Fiber Rear Diffuser Brand New” is in sale since Sunday, October 3, 2021. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Exterior\Bumpers & Parts”. The seller is “euroactive” and is located in Olyphant, Pennsylvania. This item can be shipped worldwide.