SKU: 80165403327

Active Autowerke Equal Length Mid Pipe - 2019+ M2 Competition

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Description

Active Autowerke Equal Length Mid Pipe - 2019+ M2 CompetitionWE ARE RECOMMENDING TO OWNERS OF CARS WITH AFTER MARKET DOWNPIPES TO USE THE RESONATED VERSION BUT WE HAVE ONLY TESTED WITH THE STOCK REAR EXHAUST AND ACTIVE VALVED EXHAUST. ON THE M2C WITH STOCK EXHAUST, THERE MAY BE SOME RASP. WITH STOCK DOWNPIPES, THERE IS MINIMAL RASP. WE DO NOT GUARANTEE RESULTS WITH OTHER MAKES OF REAR EXHAUSTS. Active Autowerke has been an industry leader in engineering high quality BMW performance products for over 39 years.


WE ARE RECOMMENDING TO OWNERS OF CARS WITH AFTER-MARKET DOWNPIPES TO USE THE RESONATED VERSION BUT WE HAVE ONLY TESTED WITH THE STOCK REAR EXHAUST AND ACTIVE VALVED EXHAUST. ON THE M2C WITH STOCK EXHAUST, THERE MAY BE SOME RASP.

WITH STOCK DOWNPIPES, THERE IS MINIMAL RASP.

WE DO NOT GUARANTEE RESULTS WITH OTHER MAKES OF REAR EXHAUSTS.

Active Autowerke has been an industry leader in engineering high-quality BMW performance products for over 39 years. Dedicated to improving the enjoyment of your driving machine with the highest quality products, Active Autowerke has been recognized as the leading BMW innovator. Our philosophy on developing refined BMW performance parts and making them available to the larger BMW community is highlighted by our most recent R&D program focused on improving the sound of the S55 exhaust. This R&D has resulted in the development of the Active Autowerke F87 M2C and M2CS equal length mid-pipe (patent pending) – the other option to our world-famous F8X single mid-pipe.

An inline 6 engine naturally has an evenly spaced exhaust pulse which results in a more smooth and full-sounding noise. However, the twin-turbo setup of the S55 engine while producing additional power has created a sound that sounds more like 2 independent inline 3's competing for noise than the throaty sound one would expect. The variance between the lengths of the front and rear down-pipes of almost a foot and a half creates unevenly spaced pulses so that when the merge in any form of crossover system whether stock, x-pipes, double x-pipes, single mid-pipe, or rear-section solutions. Since the sound waves are moving at the same rate when they exit the system, these crossover sections are simply creating a higher-pitched sound resulting in the annoying sound some have referred to as a weed eater sound. The current systems allow the banks to merge unequally pulsed sounds and after much research and testing (from many BMW experts) it was determined that equalizing the length of the exhaust pipes before mixing was a solution to this sound problem.

Initial exhaust solutions focused on correcting this variance in the space behind the differential housing with one complaint being the inability to keep existing rear exhaust systems. Active Autowerke decided to leverage our expertise in having already developed a single mid-pipe system for the F-series M cars and devoted our R&D resources to developing the mid-pipe solution which you see here. Our R&D looked at the ways this could be done and while making up the difference in the rear section of the exhaust seemed like the most logical place, it would require a brand new rear exhaust system and we were aware that many BMW owners would not like this option. So we looked at adding length to the passenger side mid-pipe section and creating a new crossover section to create an exhaust note that's never been akin to the "S55 sound". Using a patented solution of a crossover with sinusoidal pipes allowed us to correct the downpipe length variance before mixing the sounds giving the expected 6 cylinder sports car exhaust notes.

The Active Autowerke M2C and M2CS Equal Length Mid Pipe was specifically designed to create equal length exhaust pipes adjusting for the difference between the front and rear banks of the F87 S55 downpipes before mixing in an X-pipe and creating an exhaust note different from the normal "S55 sound". Engineered for an exact fit on both the F87 M2C and M2CS, the difference in sound with this mid-pipe will be noticeable the first time with an open throttle!

PLEASE NOTE: IT IS STRONGLY RECOMMENDED THAT CARS WITH CATLESS (STRAIGHT-THROUGH) DOWNPIPES USE THE RESONATOR OPTION FOR THE EQUAL LENGTH MID-PIPE.

KEY FEATURES

  • Lighter weight than the factory system
  • Quicker turbo spool
  • Increased low end and mid-range power
  • Equal length design eliminates the pulsing sound caused by the unequal length downpipes

F87 M2C Mid-Pipe-Equal Length (EL)-Resonated Install Guide

F87 M2C Mid-Pipe-Equal Length (EL)-Non-Resonated Install Guide


Shipping Notes
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Exchange/Return Notes
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SKU: 80165403327

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4.9 ★★★★★
Based on 19 reviews
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Product Reviews
D
Verified Purchase
DrM
Grantham, US
★★★★★ 5
Aggressive chewer approved
Size: Large, Number of Items: 1, Size: Large, Number of Items: 1
Got this to help amuse my 90lb GSD while I was out of town for a month. He gets one meal a day in it, and really enjoys the work. It’s easy, not a puzzle, no frustration, just a “job.” He chewed on the yellow top pretty aggressively while I was gone, and it still works fine. This is a dog that destroys even the most durable chew toys in minutes to hours when he’s anxious, and I imagine he experienced some anxiety while I was gone especially during periods when he was alone. So, I’m quite pleased with the durability. This will definitely stay in the meal service rotation and I will replace it if necessary. One thing to note: the fill hole is pretty small. His kibble is small enough that one might think it would easily pour right in, but no. At some point I’ll get annoyed enough to pull out my drill and make that hole larger.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 22, 2026
C
Verified Purchase
carly shick
Battle Creek, US
★★★★★ 5
Good product, fun distraction
Size: Large, Number of Items: 1
Honestly great and keeps them entertained while eating. Have a 5 month old pupper who chews and destroys. This is a fun distraction
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
M
Verified Purchase
manuel rodriguez
Lowell, US
★★★★★ 5
My dog loves it
Color: 1 PC-Beef-Red, Color: 1 PC-Beef-Red
The bone arrived today and my dog loves it. He is a very aggressive chewer and destroyed almost all his toys so far, even toys that were advertised for aggressive chewers unfortunately didn't held out long, the longest so far was a stuffy we couldn't find anymore and that one lasted him a few weeks but everything else lasted him an hour up to a few days max, even bones don't last him long so we have our hopes set on this bone to satisfy his chewing needs. I will update my review later on sturdiness, since we just got it and I can't review that yet but so far he loves it he has been chewing on it non stop, he already managed to get very small pieces of as shown in picture but with a regular bone he would've already been much much further. The bone is only 10 bucks so the value for money you get based on my experience so far is amazing! But also for this I will come back later to touch upon more. The size is good, our boy is a medium sized dog and this bone was advertised for medium to large size dogs and I thinks the size is just right for our boy . And there is definitely a beef flavor on it you can smell it but it doesn't smell bad it's a nice smell and not very strong but when he is chewing on it you smell it. I would based on my experience so far definitely recommend this bone but also on this I will touch back upon later if it's worth it in the long run. So far a very happy dog and owners here. Edit on May 8th (original review was on March 11th) He still hasn't managed to destroy it it's the first (cgew)toy he hasn't managed to destroy yet which is very impressive since he managed to destroy the even most toughest things we got for him in a week tops and bones within 1, 2 days tops, so we are very happy and pleased with this bone and will definitely get more later. He still enjoys chewing on it and leaves our things mostly alone for some reason he just likes stealing my things and chew on it lol. So 2 months later still stand by recommending this when your dog loves to chew and destroys everything he puts his mouth on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2026
J
Verified Purchase
Joy
San Leandro, US
★★★★★ 5
Extremely durable, dogs love them
Color: 2 PC-Beef-Red, Color: 2 PC-Beef-Red
I was looking for the toughest and most durable dog chew bone I could find and this is it. I have bought multiple other brands that claim to be very durable and tough for a very long time and this is the one for sure. The shower has described this phone accurately and it truly does last. I purchased this bone about 2 months ago. As you see from the photos attached, this is a very well made chew bone and my aggressive pitbulls can't tear it apart do they try. They never get tired of it and chewing it every single day for hours on and keeping them very occupied. I have two bones and three pitbulls that chew on it every day. It is so adorable and has an awesome flavor to it which I think entices them even more to want to chew on it. The durability and Lasting power is amazing to me with these tough chewers. I highly recommend this product to everyone out there. I will say only one negative and that is that the middle wraparound piece they were able to pull off but that is not a big deal because there is plenty of bone which was under that cover in the middle of the bone. There's a few mauled chips missing from the ends but the life of this bone is obviously going to be a long time which really surprised me. Give it a shot if you have heavy duty chewers and you will find how awesome this phone really is and it's durability and strength our second to none in my opinion.
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Reviewed in the United States on September 5, 2025
W
Verified Purchase
WhoFan69
Battle Creek, US
★★★★★ 5
My dog loves it.
Color: 1 PC-Beef-Red
My dog is a super aggressive chewer when it comes to toys. Anything that is soft he rips apart. This one has a wonderful squeaky sound that makes him happy and he enjoys the smell of it. This is a very strong material and definitely worth the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026

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