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      06-18-2020, 10:27 PM   #1
mike@x-ph.com
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Talking Active Autowerke Equal Length Midpipes - 2 Types!



Active Autowerke has been an industry leader in engineering high quality BMW performance products for over 39 years. Dedicated to improving 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 F80 M3 and F82 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 addition power has created a sound which 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 into 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 midpipe 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 F8X 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 F80 M3 and F82 M4 down pipes 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 F80 M3 and F82 M4, 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 MIDPIPE.



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




High flow downpipes + resonated equal length midpipe + REMUX axle back

(valves closed)


(valves open w/aggressive burbles)



resonated with stock downpipes and stock rear exhaust.


High Flow catted downpipes + resonated midpipe + REMUS axle back


Full Install video + sound clip


Stock Downpipe + non res midpipe + Active Autowerke 3 can rear muffler



calebcross
-AA Equal Length Non-Resonated Midpipe
-Stock Non-Competition Muffler
-Stock Downpipes
-Active Sound turned OFF
-Valves unplugged

There are 4 short clips:
1. Standing free revs
2. Windows down full throttle
3. Windows down decelerating downshifts
4. Windows up full throttle
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Last edited by mike@x-ph.com; 10-14-2020 at 11:29 AM..
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      06-18-2020, 10:30 PM   #2
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Hey Mike, can you please get sound clips as soon as possible? Sounds really good on AA’s page but will be good to see more examples
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      06-18-2020, 10:37 PM   #3
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Looking for the non-res (stock DP) version please
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      06-18-2020, 10:42 PM   #4
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Is there a price?
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      06-18-2020, 11:10 PM   #5
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Quote:
Originally Posted by aswy6 View Post
Is there a price?
It's on their website for pre-order for $1234. $1518 for the resonated version.
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      06-19-2020, 12:23 AM   #6
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Damn I want!!
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      06-19-2020, 05:13 AM   #7
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Anyone know what kind of resonators they are using with the resonated version? I noticed the resonators are on the attachments vs the main pipe. I'm curious to know if these work with the single midpipe as well or if we can purchase. I want to go with a DP and not have my car sound like trash. lol
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      06-19-2020, 06:58 AM   #8
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Im calling it the AA "Anaconda".
Looks so cool!!! AA does great work.
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      06-19-2020, 07:42 AM   #9
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Well, isn't that SPECIAL! 7 months after I installed their highly-recommended single-midpipe, they come out with this. Wish I'da known!
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      06-19-2020, 07:53 AM   #10
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Is this the same midpipe? If so, it sounds amazing!

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      06-19-2020, 10:02 AM   #11
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Quote:
Originally Posted by aBMWfan View Post
Hey Mike, can you please get sound clips as soon as possible? Sounds really good on AA’s page but will be good to see more examples
Will do

Quote:
Originally Posted by ellipsis212 View Post
Looking for the non-res (stock DP) version please
Quote:
Originally Posted by aswy6 View Post
Is there a price?


Quote:
Originally Posted by ShoNufff View Post
Is this the same midpipe? If so, it sounds amazing!
It is
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      06-19-2020, 10:15 AM   #12
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I like the odd sexiness of this aesthetically...if this transforms the exhaust note as said- this is a killer mod to have imo
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      06-19-2020, 10:54 AM   #13
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Quote:
Originally Posted by jninja View Post
I like the odd sexiness of this aesthetically...if this transforms the exhaust note as said- this is a killer mod to have imo
The only thing imo wrong with this car besides AWD and that effing crank hub.
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      06-19-2020, 11:10 AM   #14
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Mine is on the way, really hoping that the non res version sounds clean with my MPE.
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      06-19-2020, 11:17 AM   #15
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Any performance difference with this vs the original AA midpipe??
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      06-19-2020, 11:54 AM   #16
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Quote:
Originally Posted by BananaSlug View Post
It's on their website for pre-order for $1234. $1518 for the resonated version.
Wow, *very* economical. Expect a mad rush of orders if the sound lives up to expectations.
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      06-19-2020, 12:35 PM   #17
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Originally Posted by FlyingLow78 View Post
Wow, *very* economical. Expect a mad rush of orders if the sound lives up to expectations.
The few systems that AA offered yesterday sold out in under 2 minutes.
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      06-19-2020, 12:46 PM   #18
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Quote:
Originally Posted by Kilabyte View Post
Mine is on the way, really hoping that the non res version sounds clean with my MPE.
Please post clips!!
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      06-19-2020, 12:47 PM   #19
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Can this AA midpipe be used with a Akrapovic rear section muffler??? I have full Akrapovic evolution exhaust with catless downpipes. Would love to swap out the akra midpipe with a resonated version of this AA midpipe.
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      06-19-2020, 02:15 PM   #20
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Quote:
Originally Posted by CT92F80 View Post
Can this AA midpipe be used with a Akrapovic rear section muffler??? I have full Akrapovic evolution exhaust with catless downpipes. Would love to swap out the akra midpipe with a resonated version of this AA midpipe.
I have this same question but with the AWE switchpath exhaust!
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      06-19-2020, 03:35 PM   #21
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Quote:
Originally Posted by Kilabyte View Post
Mine is on the way, really hoping that the non res version sounds clean with my MPE.
Can't wait to hear this combo.
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      06-19-2020, 03:38 PM   #22
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1. how does this differ from the original setup?
2. will it still connect to an rear section which is now mated to the AA midpipe.
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