The Active Autowerke F8X rear exhaust was carefully engineered to eliminate the unflattering sound of the factory M3 and M4 exhaust, while also allowing for optimum flow and resonance. Every effort was made in addressing the not so appeasing sound of the stock OEM exhaust, but in designing an exhaust worthy for an "M" car. We believe our rear exhaust combined with our mid-pipe offers the deepest sound and best performance of any other system on the market today. Available for both models, this axle-back exhaust gives your BMW the deep, throaty, growl a car of its caliber should have had from the factory!
The most noticeable difference between the Active Autowerke F8X Rear Exhaust Section and the BMW factory exhaust is how they utilized the muffler. The design incorporates two mufflers that create a huge resonance chamber to further cancel out the “weed eater” noise.
This design also allows exhaust gases to crossover freely without being forced in a certain direction - eliminating back pressure without sacrificing that deep, aggressive rumble that some turbocharged cars are known for.
- Made in the USA
- 18+ WHP gain over stock*
- 30+ LB-FT gain over stock*
- Quicker turbo spool
- Low, Deep Rumble
- Flex joints to reduce vibration
- Double-canned muffler to reduce resonance
- Each exhaust test-fit on our F8X Exhaust Fixture
- Guaranteed to fit all F80 BMW M3/F82 BMW M4
- Includes all necessary installation hardware
*When paired with Active Autowerke F8X Mid-Pipe
This Part Fits the Following Vehicles