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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > Active Autowerke B58 catted downpipe NO CEL Guarantee!
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      11-26-2019, 05:31 PM   #23
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Quote:
Originally Posted by mike@x-ph.com View Post
Since its a catted pipe, its not going to be that much louder than stock
Quote:
Originally Posted by BMWApp View Post
Thanks, Mike. That definitely answers my question.
That has not been my experience. I first added the AWE catback exhaust, and that made things quite loud. I then added a 5" catted DP and that turned the volume up another 20% or so. That was for the CG DS-1. I'm sure this high-flow will increase the noise as well.
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      11-26-2019, 05:39 PM   #24
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Quote:
Originally Posted by G.Newt View Post
That has not been my experience. I first added the AWE catback exhaust, and that made things quite loud. I then added a 5" catted DP and that turned the volume up another 20% or so. That was for the CG DS-1. I'm sure this high-flow will increase the noise as well.
Its different for every exhaust but on stock exhaust it will only make a big difference on cold start and WOT.
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      11-26-2019, 05:43 PM   #25
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by G.Newt View Post
That has not been my experience. I first added the AWE catback exhaust, and that made things quite loud. I then added a 5" catted DP and that turned the volume up another 20% or so. That was for the CG DS-1. I'm sure this high-flow will increase the noise as well.
Its different for every exhaust but on stock exhaust it will only make a big difference on cold start and WOT.
Agreed for stock exhaust, but he stated he has the AA exhaust already. Just trying to provide accurate expectations. It's gonna be loud 😂
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      11-30-2019, 01:26 PM   #26
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Doesn’t come with brackets. Can I reuse the factory ones? I haven’t looked underneath yet.
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      11-30-2019, 01:30 PM   #27
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Doesn’t come with brackets. Can I reuse the factory ones? I haven’t looked underneath yet.
Yes you can re-use the stock hardware
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      11-30-2019, 02:31 PM   #28
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Quote:
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Yes you can re-use the stock hardware
Will do, thanks.
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      11-30-2019, 02:38 PM   #29
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Looks great!
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph.
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      11-30-2019, 02:59 PM   #30
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Looks great!
Hey , once installed please share any video..
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      11-30-2019, 07:53 PM   #31
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Looks great!
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      12-01-2019, 10:52 AM   #32
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by boosted View Post
Doesn’t come with brackets. Can I reuse the factory ones? I haven’t looked underneath yet.
Yes you can re-use the stock hardware
Where is the welded 2 bolt bracket every other downpipe has?
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      12-01-2019, 12:28 PM   #33
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Where is the welded 2 bolt bracket every other downpipe has?
Don’t need. This AA lightweight pipe goes inside mid-pipe exhaust with bracket holding tight on one end and connects with turbo on the other end with large O bracket. Fits like a glove!
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph.

Last edited by boosted; 12-01-2019 at 11:33 PM..
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      12-01-2019, 12:30 PM   #34
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Hey , once installed please share any video..
Here is a cold start, it's actually rather pronounced (phone video) then it goes close to stock when idle after 30 sec. Very cool sound

https://youtu.be/TqI_nmhpbeA

And here is the getting on it (not WOT) at 38* ambient temp and raining. Very happy with a sound

https://youtu.be/GP9Tz8VFbVw
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph.

Last edited by boosted; 12-01-2019 at 11:31 PM..
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      12-01-2019, 11:52 PM   #35
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Brief review.

In short - very happy. Torque is everywhere!

Quality - top! As expected.

Installation
Perfect fitment - absolutely no issues. I went with a mechanic shop and assisted (took about 2 hours going slow). Having lift is so much easier and we removed underneath covers to have plenty of room. As mentioned - no need the middle bracket (shown below with red arrow) since this lightweight downpipe connects with exhaust and turbo. Having the right tools makes a difference - hence the shop I know and can recommend in IL (below $250)

Ride
Keep in mind outside is 38* raining and nowhere I could go WOT. However, considering the weather I do prefer above 40mph where the car just pulls and pulls non-stop. See video above turning to a street and getting on it (not WOT).

Sound:
See videos above.
Great sound and very civilized when warmed up - close to stock, however I have a stock exhaust. Overall very happy and with MP flash tune Stg3 DME/ Stg1 trans - the car just feels great!

And guess what? No CEL

Thank you AA for R&D and quality workmanship, and Mike (x-ph), for quick processing and organizing delivery with tracking!
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2018 340i x-drive 8AT - MP (Mission Performance) stg 3 DME tune, Xhp stg 3 EGS tune, catted AA downpipe, NGK plugs, E30 blend - 11.4@120mph.

Last edited by boosted; 12-02-2019 at 12:06 AM..
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      12-04-2019, 11:31 AM   #36
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2016 BMW 340i  [0.00]
Is this legal in CA?
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      12-04-2019, 11:33 AM   #37
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Is this legal in CA?
Its not Carb legal, no
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      12-23-2019, 11:24 PM   #38
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Just enjoying da pipe 😜
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      12-24-2019, 10:55 AM   #39
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Just enjoying da pipe 😜
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      12-30-2019, 02:39 PM   #40
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Got this one for xmas from the wife, which was a huge surpise that she knew I was looking at it!

No CEL at all and no stink. It fit without issue and is slightly lighter than the stock DP. Not having the bracket did make it easier to put in, and it is lighther. I don't anticipate there being issues with not having brackets, but it would be nice if they did include some.

Stage 2 on BM3 and it pulls great!
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      12-30-2019, 05:51 PM   #41
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Quote:
Originally Posted by somedood View Post
Got this one for xmas from the wife, which was a huge surpise that she knew I was looking at it!

No CEL at all and no stink. It fit without issue and is slightly lighter than the stock DP. Not having the bracket did make it easier to put in, and it is lighther. I don't anticipate there being issues with not having brackets, but it would be nice if they did include some.

Stage 2 on BM3 and it pulls great!
Congrats
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      01-02-2020, 11:00 AM   #42
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Picture by a90moe

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      02-24-2020, 11:18 AM   #43
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Pictures from satindragon (Supra Forum, same downpipe)





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      02-24-2020, 10:44 PM   #44
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Did my install over the weekend with some help from a couple buddies. Stage 2 feels great! Instagram has a cold start vid: @astutef30

Thanks Mike for all the help!
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