Supersprint Racing Rear Exhaust - BMW 3 Series E30 M3 2.3 | 2.5Supersprint Rear exhaust OO 70 Fitted with a smaller silencer compared to the E. E. C. Homologated component, to be louder and lighter ( 4. 4kg) 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