Active Autowerke F80 M3/F82 M4 Single Mid Pipe Resonated

This is the resonated version of the Active Autowerke single mid pipe for the BMW F80 M3 and F82 M4. It uses the same single-pipe merge as the straight version, plus connecting pipes with resonators to take the edge off the rasp. It suits a daily-driven car or one with aftermarket downpipes. The Active Autowerke F-brace is included.

The twin-turbo S55 feeds the exhaust from front and rear downpipes that differ in length by almost a foot and a half, so the two banks of three cylinders arrive out of step. That mismatch is what owners describe as the raspy, "two inline-threes" or weed-eater sound.

What It Does

The factory middle silencer has a small crossover that is restrictive and makes the uneven turbo sound worse. Active Autowerke replaces it with one oval 3.5 in pipe that merges both banks, which removes much of the weed-eater tone and frees up flow. The resonators in the connecting pipes trim the high, harsh frequencies, so the car sounds fuller without being as raw as the straight-pipe version.

Materials and Construction

The single section is oval so the 3.5 in flow area fits under the car without hurting ground clearance. The resonated connecting pipes link the mid pipe to the factory rear section or to an Active Autowerke rear exhaust. The kit is designed for an exact fit on the F80 M3 and F82 M4.

Features

• Single oval 3.5 in merge replaces the factory middle silencer
• Resonated connecting pipes cut rasp
• Fuller S55 tone with less buzz than stock
• Active Autowerke F-brace included
• Works with the factory rear section or an Active Autowerke rear

Specs

• Part number: 11-037R (resonated)
• Brand: Active Autowerke
• Type: single mid pipe with resonated connecting pipes
• Engine: BMW S55 3.0L twin-turbo inline-six
• Shipping weight (Active Autowerke): 61 lb (27.7 kg)
• Straight-pipe version: 11-037, sold on its own page

Video

Fitment Notes

• Active Autowerke lists this part for the F80 M3 sedan and F82 M4 coupe. The F83 M4 Convertible is not on its list, so contact us before ordering for that car.
• Questions before you order? Call or text (310) 231-0292 or email Online@AutoTalent.com.
• Shop all Active Autowerke mid pipes, every Active Autowerke exhaust or the full Active Autowerke range.

FAQ

Resonated or straight?
Choose resonated if you want less rasp or have aftermarket downpipes. The straight version (11-037) is louder and rawer.

Is it much quieter than the straight version?
It is still clearly louder than stock. The resonators mostly remove harsh, raspy tones rather than volume.

Can I change to the straight pipes later?
Yes. Active Autowerke sells the connecting pipes on their own, so you can swap them later.