The rears of the BMW X5 M (F85) and BMW X6 M (F86) can both be further enhanced by adding the optional ABE-compliant carbon-fibre diffuser. Developed using high-grade racing materials, this beautifully finished accessory is designed to fit perfectly within the lines of both cars and complement the unique tailpipes of the Evolution Line (Titanium) exhaust system.Diffuser can be used even with BMW tow bar. When mounting Akrapovic rear carbon fiber diffuser BMW comfort access system will not work.