The AWE GEN2 SwitchPath™ Catback Exhaust is a factory-friendly, performance-tuned exhaust upgrade for the BMW F80 M3 and F82/F83 M4 (S55 engine, 2015–2020). It replaces the restrictive factory muffler section with a 3″ CNC mandrel-bent stainless system featuring a precision X-pipe and the patented AWE SwitchPath™ valved muffler, which retains OEM valve control and driving modes for on-the-fly sound tuning. Closed-valve modes keep interior noise refined for daily driving, while open-valve modes unleash a deep, powerful exhaust note with engaging burbles and growl under acceleration. This cat-back suite enhances throttle response, expands exhaust character, and preserves emissions compliance without triggering diagnostic lights.
Designed for BMW M3 (F80) and BMW M4 (F82/F83) equipped with the S55 twin-turbo inline-6 (2015–2020).
Valve-integrated design works with the factory exhaust valves and M-Sport/Comfort modes for dynamic sound.
50-state legal catback layout retains all catalytic elements — no check engine lights when properly installed.
Direct bolt-on installation replacing just the rear catback section of the stock exhaust.
AWE GEN2 SwitchPath™ catback exhaust assembly with precision-engineered X-pipe.
Valved SwitchPath™ muffler tuned for the S55 engine.
Quad 102 mm double-walled slash-cut tips (choice of chrome silver or diamond black).
Mounting hardware, gaskets, and installation guide.
Material: U.S.-sourced T304L stainless steel, .065″ wall thickness.
Piping Size: 3.0″ CNC mandrel-bent catback configuration.
X-Pipe: Precision-engineered for balanced flow and cleaner tone.
Tip Options: 102 mm dual-walled slash cuts in chrome silver or diamond black finishes.
Emissions: 50-state legal design with all catalysts intact.
Warranty: AWE Lifetime Exhaust Warranty plus No Check Engine Light Guarantee.
Valved exhaust control: Retains factory valve functions for dynamic sound tuning via drive modes.
Precision X-pipe: Unlocks a cleaner, richer tone and improves exhaust scavenging.
Optimized flow: Mandrel bends and increased diameter help reduce backpressure and support throttle response.
Dual-mode sound: Quiet and refined under cruising (valves closed), aggressive and engaging under load (valves open).
Premium finishes: Choice of distinctive diamond black or classic chrome silver tips.
Quality construction: Handcrafted in the U.S. with high-grade materials and strict manufacturing tolerances.
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