Supersprint Rear Exhaust 100mm Tailpipes - BMW 1 Series F20/F21 M135I/M140I 4 Series (F32 / F33) Additional 100-120 hp on a

Additional 100-120 hp on a stock vehicle

growing to an aggressive roar when driven hard but without droning

A standard car will accelerate well up to 5500 rpm

power gains are achieved and weight reduction realized

the hood convinces on the whole line

Supersprint Rear Exhaust 100mm Tailpipes - BMW 1 Series F20/F21 M135I/M140I 4 Series (F32 / F33) Additional 100-120 hp on aSupersprint Rear exhaust right O100 left O100 Fitting this components will remove the electrical bypass valve present on the OEM muffler. This doesn't involve any electronic, performance or sound issue. Unlike the stock muffler, this exhaust has a perfectly symmetrical separation of the gas between left and right side. The 100mm tips don't need any trimming of the valances. They are available in matte black, polished black and satin silver on request.