Active Autowerke
Active Autowerke Exhaust Valve Extension Cable - 2014+ M3 / M4, 2019+ M2C (F8x) | 11-074
US$56.00
At Active Autowerke, it's not ONLY about making as much power as possible. For over 30 years, power has been the end result of improved performance due to our relentless desire to develop a refined, quality product. This philosophy behind our performance parts is best represented by one of the newest additions to our F80 BMW M3 and F82 BMW M4 collection.
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 appealing 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! And NOW, after many requests from our dedicated customers, we are introducing a valved version of the ultimate exhaust which has been dubbed "Maad Maxx" by our team. We will update dyno charts later but this exhaust flows even better with its valving system.
See what actual customers are saying on BimmerPost!
*When paired with Active Autowerke F8X Mid-Pipe
RED Line Stock Figures: 380 WHP | 371 WTQ
BLUE Line Full Active Autowerke Exhaust: 398 WHP | 401 WTQ
GOLD Line Full Active Autowerke Exhaust Run 2: 397 WHP | 398 WTQ
Note: Active Autowerke Full Exhaust System is recommended for, BUT NOT LIMITED TO, off-road or racing applications.
The OEM F8X exhaust utilizes the services of middle and rear silencers as well as a pair of exhaust valves. It is supposed to be a freely-flowing exhaust that produces an external sound that meets the demands of an M3 or M4.
The middle silencer has a small crossover that allows for noise dampening while the rear silencer (muffler) has a reflection chamber on either end that re-directs exhaust gases to the opposite side they entered from (drive's side exhaust exits on the passenger side). When the exhaust valves are closed, this helps eliminate the backpressure buildup that occurs during noise dampening.
After analyzing the factory exhaust, we realized less would be more in regards to our F8X exhaust.
We began with a complete redesign of the mid-pipes. This involved drastically increasing exhaust flow as well as reducing the uneven, out-of-sync turbocharger sound that many F8X owners have complained about on the forums. We were able to achieve this on our F8X Mid-Pipe (sold separately) by using a single pipe that not only cancels out the offensive sound but allows unrestricted exhaust flow.
The most noticeable difference between the Active Autowerke F8X Rear Exhaust Section and the BMW factory exhaust is how we utilized the muffler. Our 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 backpressure without sacrificing that deep, aggressive rumble that some turbocharged cars are known for.
Active Autowerke
Active Autowerke
Active Autowerke
