Supersprint Valved Rear Exhaust 80mm Tailpipes - BMW 1 Series F20/F21 M140ISupersprint Rear exhaust with valve 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,