BMW F85 X5M 3D Style Carbon Fiber Rear Diffuser 2015 2018 Akrapovi Rear Carbon Fiber Diffuser 2015 2017 BMW X5 M (F85) Matte Finish 2014 2018 BMW X5 F15 Carbon Creations M Performance Aero Rear Diffuser BMW F85 X5M 3D Style Carbon Fiber Rear Diffuser 2015 2018. Rear Carbon Fiber Diffuser Adding the optional ABE compliant carbon fiber diffuser can further enhance the rears of the BMW X5 M (F85). Developed using high grade racing materials, this beautifully finished accessory is designed to fit perfectly within the lines of the X5 M and complement the unique tailpipes of the Evolution Line Titanium exhaust system. Diffuser can be used with BMW tow bar. Note: When mounting Akrapovic rear carbon fiber diffuser BMW comfort access system will not work. 2015 2017 BMW X5 M (F85)