Making the S55 sound great. Again. Presenting the second generation AWE Exhaust Suite for the BMW F8X M3 and M4:
 
Unified design for OPF euro and non-euro spec cars (2015 - 2020 fitments confirmed)
50-state legal catback design:
sick sound with all catalysts intact
Precision-engineered X-pipe to unlock a clean S55 tone
Available as valved SwitchPath™ or rowdy Track Edition
SwitchPath™ utilizes factory valving and retains M-Sport button functionality
3” CNC mandrel-bent catback configuration
Max gains of 12 hp and 16 ft-lbs of torque at the wheels
Track Edition comes complete with AWE machined mechanical valve simulators
Tip options include 102mm double-walled, slash-cut tips in chrome silver or diamond black
Handcrafted from U.S.-sourced .065" wall T304L stainless steel
Proudly engineered, designed, and manufactured in-house at AWE
No Check Engine Light guarantee
Perfect Fitment guarantee
Featuring the AWE Lifetime Exhaust Warranty