This BMW G8X M3/M4 Carbon Fiber Diffuser Trim offers the an aggressive appearance upgrade for your M3 or M4 without the bulk of a full diffuser or in addition for peak aggression. Our new rear diffuser trim features an alternate aggressive design to enhance the rear visual appeal of your vehicle. 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 2x2 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.