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 intactPrecision-engineered X-pipe to unlock a clean S55 toneAvailable as valved SwitchPath™ or rowdy Track EditionSwitchPath™ utilizes factory valving and retains M-Sport button functionality3” CNC mandrel-bent catback configurationMax gains of 12 hp and 16 ft-lbs of torque at the wheelsTrack Edition comes complete with AWE machined mechanical valve simulatorsTip options include 102mm double-walled, slash-cut tips in chrome silver or diamond blackHandcrafted from U.S.-sourced .065" wall T304L stainless steelProudly engineered, designed, and manufactured in-house at AWENo Check Engine Light guaranteePerfect Fitment guaranteeFeaturing the AWE Lifetime Exhaust WarrantyThe Track Edition:AWE’s second-generation catback Track Edition takes all of the precision engineering and performance of its SwitchPath™ counterpart, minus the valved muffler in the rear. The result is a constant “valve open” mode, at an affordable price. If you’re craving rich and rowdy tones at all times, and a hefty 22.5lb weight savings, this is your dose of steel.The Track Edition Exhaust, also 50-state legal like its SwitchPath™ sibling, comes complete with AWE valve simulators to accommodate your factory exhaust valve motors. Happy ECU, happy life.Note: This version is known to get rowdy, and may be too much for many. For that reason, this particular version cannot be returned due to sound preference. Prepare yourself (Sport+ mode can be pretty raucous)!Tip Options:The SwitchPath™ and Track Edition Exhausts feature statement-making quad 102mm double-walled, slash-cut tips in either chrome silver or diamond black, complete with a stamped AWE logo.Install Instructions can be found here.