If you’ve seen the new M4 GTS then you know one of the showstopping elements aesthetically is the new free-flow carbon fiber spoiler that proudly prominently sits atop the trunk in all its aggressive glory. Now you can retrofit this GTS spoiler to your M4 Coupe. This kit includes the spoiler, adhesive, tool kit, hardware, supports, and adapters. It is complete and brand new in box. Check out our extensive selection of great BMW parts and accessories by going to our store. Track Page Views With. Auctiva’s FREE Counter. The item “BMW F82 M4 Coupe GTS Rear Spoiler Carbon Fiber Retrofit Kit Brand New” is in sale since Tuesday, April 25, 2017. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Exterior\Spoilers & Wings”. The seller is “euroactive” and is located in Olyphant, Pennsylvania. This item can be shipped worldwide.