Akrapovic Tail pipe set (Titanium) for BMW M3 (F80) and M4 (F82,F83)Akrapovic Tail pipe set (Titanium) for BMW M3 (F80) and M4 (F82,F83) As the most visible part of an exhaust system, we pay the utmost attention to the tailpipes. Akrapovi has created special titanium tailpipes to enrich the visual enjoyment of the Slip On or Evolution exhaust systems. Sporting the unique Akrapovi round design, the titanium version combines polished and sandblasted titanium and a bigger diameter than stock tailpipes to make them stand