Active Autowerke BMW M3/M4 (F80/F82/F83) Signature Catback Exhaust System

Built from the ground up for maximum performance and sound, this is a complete turbo-back exhaust system engineered specifically for the S55-powered F8X M3 and M4. The factory centre section uses a dual-pipe layout that both restricts flow and contributes to turbo lag. Active Autowerke's Signature System solves both problems at once, replacing it with a single 3.5in pipe that improves exhaust flow, sharpens turbo response, and delivers a deep, purposeful sound in its place.

Constructed entirely from 100% SS304 stainless steel with full TIG welding throughout (never MIG), the 3.5in mandrel-bent design is engineered to handle power levels well beyond stock, making it just as suitable for a factory-spec M3 or M4 as it is for heavily modified builds, including turbo upgrades. A carefully engineered Y-pipe layout, full 3.5in diameter, and integrated valve system deliver excellent flow while finally giving the S55 the genuinely sporty exhaust note it was missing from the factory, while still retaining the ability to close the valves for quiet, everyday driving.

Works with: OEM valve actuators. Turbo-back 3.5in construction, from the downpipe all the way to the exhaust tips.

Why Choose This Exhaust System

• 100% SS304 stainless steel construction, fully TIG welded (no MIG welding)
• Mandrel-bent 3.5in turbo-back pipework, from downpipe to tips
• Engineered Y-pipe design for optimal exhaust flow
• 90mm adjustable-position exhaust tips
• Works with OEM valve actuators for full quiet/loud control
• Built to handle both stock and heavily modified engines
• No permanent vehicle modification required for installation
• Manufactured in Miami, Florida, USA

Compatibility

• BMW F80 M3 Sedan (2014-2020)
• BMW F82 M4 Coupe (2014-2020)
• BMW F83 M4 Cabriolet (2014-2020)