Akrapovic Carbon Fibre Rear Diffuser - BMW 3 Series F80 M3 | 4 Series F82 | F83 M4The Akrapovic Evolution and Slip On line exhaust systems can be further enhanced with an optional hand crafted carbon fiber rear diffuser. Developed by Akrapovics Design Department, this stunning diffuser, crafted from materials developed through Akrapovi?s racing involvement, is designed to perfectly fit the lines of the unique tailpipes of the Slip On or Evolution systems, as well as complement the sleek and sporty shape of the BMW.