Active Autowerke BMW M3/M4 (F80/F82/F83) Single Midpipe

This is one of the most popular modifications available for the S55, and for good reason. The factory exhaust on the F8X M3/M4 uses a dual-pipe design that restricts exhaust flow and produces an unnaturally flat, almost "lawnmower-like" drone rather than a proper M-series growl. Active Autowerke's 3.5in Single Midpipe solves both problems at once, improving flow, delivering a deeper, more throaty tone, and letting the turbos spool more quickly.

The pipe is engineered specifically around the F8X chassis for a precise fit with no ground clearance issues. Built from 304 stainless steel with an oval profile section, it combines maximum flow efficiency with genuine durability and a perfect factory-matching fit. On the dyno, this single midpipe shows real, measurable gains, +18hp and +30Nm over stock, with noticeably sharper response through the low and mid rev range, and an exhaust note that finally sounds like a proper BMW M car should.

Works with: Factory mounting points. Plug-and-play installation with no permanent modification required.

Why Choose This Single Midpipe

• Dyno-proven gains of +18hp and +30Nm over stock
• 3.5in diameter with an oval profile for optimal ground clearance
• Deeper, more purposeful sound, eliminates the factory's flat "lawnmower" drone
• Faster turbo spool from reduced backpressure and improved exhaust flow
• Lighter than the factory dual-pipe midsection
• 304 stainless steel construction with high-quality welds throughout
• Plug-and-play fitment, no permanent modification required

Compatibility

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