AWE Switchpath Cat-Back Exhaust System for BMW F80 M3 and F82 M4

Description

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.

Fitment Notes

• 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.

Included

• 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.

Product Specs

• 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.

Product Features

• 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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