This BMW G80 M3 and G82 G83 M4 Carbon Fiber Outer Diffuser Trim is a great addition to complete your G8x diffuser upgrade. This piece will mount on the outside of your OEM or RW Carbon diffuser and will replace your OEM gloss black trim, giving you a more complete and aggressive look. The G8X M3/M4 Carbon Fiber Diffuser Trim will seamlessly match other RW or OEM parts you have on the vehicle as we craft them from genuine 2×2 weave carbon fiber. We know our customers care deeply about the parts they choose to install on their vehicle which is why we only use the highest quality carbon fiber fabric, clearcoats, and resin in the making of our products. Just like the rest of our products, this carbon fiber diffuser trim comes with the RW superior fitment and quality guarantee. Installation is purely bolt-on and does not require and special modifications or cutting.