VRSF Race Muffler BMW 335i 435i N55 F30 F32VRSF Race Muffler Delete BMW 335i 435i N55 F30 F32 The OEM muffler on the N55 F30 and F32 is one of the most restrictive parts of the exhaust system. Deleting it reduces back pressure significantly, delivers faster spool, more power, and transforms the exhaust note into something that actually sounds like a performance car. Built with a unique CAD CAM designed cast stainless steel merge collector for the smoothest possible transition from single pipe