Mid Pipe Modification

biggripper · 04-10-2019, 10:47 AM

What are the potential plusses and minuses of having a reputable local exhaust shop simply remove the whatever resonators/cats are on the stock mid Pipe? It seems like this could probably be done for under $500.

I did this on a previous car and it worked out well.

I'm prepared to accept this might be a bad idea so I'd like some rational discussion as to why or why not.

CosmosMpower · 04-10-2019, 10:49 AM

If you have a good shop that can do clean welding work should be fine, use mandrel bent piping. The AA midpipe is 1k+

mike@x-ph.com · 04-11-2019, 08:02 PM

Quote:

Originally Posted by biggripper

What are the potential plusses and minuses of having a reputable local exhaust shop simply remove the whatever resonators/cats are on the stock mid Pipe? It seems like this could probably be done for under $500.

I did this on a previous car and it worked out well.

I'm prepared to accept this might be a bad idea so I'd like some rational discussion as to why or why not.

The work itself is not that complicated but why would you do that? This car is raspy as is.

If you are going to do a midpipe modification, get Active Autowerke for a cleaner exhaust tone

biggripper · 04-11-2019, 09:03 PM

I'm still considering the AA mid Pipe, I just have a problem with the price. While $1200 isn't really that much in the the grand scheme, I'm just not convinced it's a fair price. I'll consult with a local custom shop and get their perspective before making my decision.

chmura · 04-12-2019, 08:43 AM

I will go with the AA midpipe I think you can purchase it for $999 with one of the venders on here. Will paint my muffler at that time.

My valves are always open right now so the AA midpipe will have a noticeable increase in sound IMO.

mike@x-ph.com · 04-12-2019, 11:31 AM

Quote:

Originally Posted by biggripper

I'm still considering the AA mid Pipe, I just have a problem with the price. While $1200 isn't really that much in the the grand scheme, I'm just not convinced it's a fair price. I'll consult with a local custom shop and get their perspective before making my decision.

Its well worth it

Cycle Pilot · 04-14-2019, 02:40 PM

I installed the AA mid pipe last weekend. With the valves open, it sounds amazing! Way deeper and the burbles aren't obnoxious. Still doesn't sound like a normally aspirated engine but way better than stock.

mike@x-ph.com · 04-15-2019, 09:43 AM

Quote:

Originally Posted by Cycle Pilot

I installed the AA mid pipe last weekend. With the valves open, it sounds amazing! Way deeper and the burbles aren't obnoxious. Still doesn't sound like a normally aspirated engine but way better than stock.

Congrats

Post a sound clip

CosmosMpower · 04-15-2019, 10:43 AM

Quote:

Originally Posted by Cycle Pilot

I installed the AA mid pipe last weekend. With the valves open, it sounds amazing! Way deeper and the burbles aren't obnoxious. Still doesn't sound like a normally aspirated engine but way better than stock.

How much louder over stock, 10%, 20%, 50%?

Cycle Pilot · 04-19-2019, 01:45 AM

Quote:

Originally Posted by CosmosMpower

How much louder over stock, 10%, 20%, 50%?

I would say at least 30%. Deeper sound too.

mike@x-ph.com · 04-30-2019, 12:04 AM

Quote:

Originally Posted by Cycle Pilot

I would say at least 30%. Deeper sound too.

Its a perfect increase for people looking to upgrade the sound without making the exhaust tone a lot louder

Karlosm2c · 04-30-2019, 01:26 AM

Quote:

Originally Posted by Cycle Pilot

I installed the AA mid pipe last weekend. With the valves open, it sounds amazing! Way deeper and the burbles aren't obnoxious. Still doesn't sound like a normally aspirated engine but way better than stock.

In all fairness to the car it's not a normally aspirated engine so is it a little unrealistic to expect it to ever sound like one? I'm glad you're happy with your AA mid pipe. Like you, I'm really liking mine and the way my car sounds now.

Karlosm2c · 04-30-2019, 01:28 AM

Quote:

Originally Posted by mike@x-ph.com

Quote:

Originally Posted by Cycle Pilot

I would say at least 30%. Deeper sound too.

Its a perfect increase for people looking to upgrade the sound without making the exhaust tone a lot louder

Exactly. And with the ASD turned off you can hear it all. I especially love the sound of the exhaust on downshifts to 4th, 3rd and 2nd coming up to a roundabout 👌🏻😎

dtmpower98 · 04-30-2019, 01:42 AM

Simple quick mod. Increases turbo spool sound thru the exhaust a little more if you have a DP and noticed a tiny bit more pronounced crackles

Hvymdl · 04-30-2019, 10:46 PM

I too considered a simple cut and remove process for the 2 cats and resonator, but as I learned with my RS5, you don't get as clean a sound...and can't easily reverse the process.... So I bought a AA midpipe through Mike. Excellent experience and the end result is far more than I expected.
With the valves open it's about 30% louder with more pronounced cracks and burbles and in Efficient it settles right back down into Church mode.
I've now gone 1 step further and flashed the stage 1 91 octane tune from Bootmod3. It wakes the base exhaust sound up a tad but really fuels(literally...) the burbles, almost in excess, and I'm on Team Burble!
I'll now be tuning the tune to reduce the burbles in Sport to have 3 tiers of exhaust aggression.

I strongly recommend both the AA MP and BM3 Tune.

Enjoy!

04-10-2019, 10:47 AM	#1
biggripper Captain 712 Rep 648 Posts Drives: 2024 G80 M3 Comp xDrive Join Date: Feb 2015 Location: UK iTrader: (0)	Mid Pipe Modification What are the potential plusses and minuses of having a reputable local exhaust shop simply remove the whatever resonators/cats are on the stock mid Pipe? It seems like this could probably be done for under $500. I did this on a previous car and it worked out well. I'm prepared to accept this might be a bad idea so I'd like some rational discussion as to why or why not. __________________ CURRENT///G80 M3CX \| Isle Of Man Green \| Kyalami Orange \| Bi-Color 826M Wheels FORMER ///F80 M3 ZCP \| Yas Marina Blue \| Black \| DCT \| Black 666M Wheels FORMER ///F87 M2C \| Alpine White/Orange \| DCT \| Black 788M Wheels FORMER ///F87 M2C \| Sunset Orange/Orange \| 6MT \| Black 788M Wheels FORMER ///F82 M4 \| SSII \| Full SO \| 6MT \| Black 437M Wheels
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04-10-2019, 10:49 AM	#2
CosmosMpower Brigadier General 2051 Rep 3,714 Posts Drives: F87c, GT3, MK7 GTI Join Date: Apr 2011 Location: Frisco, TX iTrader: (1)	If you have a good shop that can do clean welding work should be fine, use mandrel bent piping. The AA midpipe is 1k+
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04-11-2019, 09:03 PM	#4
biggripper Captain 712 Rep 648 Posts Drives: 2024 G80 M3 Comp xDrive Join Date: Feb 2015 Location: UK iTrader: (0)	I'm still considering the AA mid Pipe, I just have a problem with the price. While $1200 isn't really that much in the the grand scheme, I'm just not convinced it's a fair price. I'll consult with a local custom shop and get their perspective before making my decision. __________________ CURRENT///G80 M3CX \| Isle Of Man Green \| Kyalami Orange \| Bi-Color 826M Wheels FORMER ///F80 M3 ZCP \| Yas Marina Blue \| Black \| DCT \| Black 666M Wheels FORMER ///F87 M2C \| Alpine White/Orange \| DCT \| Black 788M Wheels FORMER ///F87 M2C \| Sunset Orange/Orange \| 6MT \| Black 788M Wheels FORMER ///F82 M4 \| SSII \| Full SO \| 6MT \| Black 437M Wheels
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04-12-2019, 08:43 AM	#5
chmura Colonel 1558 Rep 2,505 Posts Drives: 2019 M2 Competition Join Date: Aug 2009 Location: Orange County, California iTrader: (1)	I will go with the AA midpipe I think you can purchase it for $999 with one of the venders on here. Will paint my muffler at that time. My valves are always open right now so the AA midpipe will have a noticeable increase in sound IMO.
	Appreciate 1 biggripper712.00 Quote

04-14-2019, 02:40 PM	#7
Cycle Pilot Second Lieutenant 157 Rep 281 Posts Drives: 2019 M2C Join Date: Nov 2017 Location: Rocklin, CA iTrader: (2)	I installed the AA mid pipe last weekend. With the valves open, it sounds amazing! Way deeper and the burbles aren't obnoxious. Still doesn't sound like a normally aspirated engine but way better than stock.
	Appreciate 2 biggripper712.00 Karlosm2c290.50 Quote

04-30-2019, 01:42 AM	#14
dtmpower98 Second Lieutenant 335 Rep 259 Posts Drives: F80 M3, F87 M2 Join Date: Jul 2017 Location: Los Angeles, CA iTrader: (0)	Simple quick mod. Increases turbo spool sound thru the exhaust a little more if you have a DP and noticed a tiny bit more pronounced crackles __________________ 2013 MW E92 M3 2018 MG F87 M2 (Sold) 2016 YMB F80 M3 (Sold) Follow me on Instagram- @dtmpower98
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04-30-2019, 10:46 PM	#15
Hvymdl New Member 6 Rep 17 Posts Drives: BMW M2 Competition Join Date: Feb 2019 Location: Toronto, Canada iTrader: (0)	I too considered a simple cut and remove process for the 2 cats and resonator, but as I learned with my RS5, you don't get as clean a sound...and can't easily reverse the process.... So I bought a AA midpipe through Mike. Excellent experience and the end result is far more than I expected. With the valves open it's about 30% louder with more pronounced cracks and burbles and in Efficient it settles right back down into Church mode. I've now gone 1 step further and flashed the stage 1 91 octane tune from Bootmod3. It wakes the base exhaust sound up a tad but really fuels(literally...) the burbles, almost in excess, and I'm on Team Burble! I'll now be tuning the tune to reduce the burbles in Sport to have 3 tiers of exhaust aggression. I strongly recommend both the AA MP and BM3 Tune. Enjoy!
	Appreciate 2 Karlosm2c290.50 biggripper712.00 Quote

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