Supersprint Racing Rear Exhaust - BMW 1 Series E82 1MSupersprint Racing Rear exhaust The rear section is the first step of the R&D and the whole exhaust system optimization process. The sporty sound is achieved from the accurate selection of the piping sections, of the unique inner silencer design, and dedicated to the specific vehicle model. The same high care is kept in the choice of the outlet style, to ensure a pleasant car design customization The installation procedure is easy and quick, because