Active Autowerk Equal Length vs. Single

AZG87 · 12-11-2023, 11:52 PM

Quote:

Originally Posted by fcman

Had my single non-resonated installed today. Have a very slight rattle on cold starts, goes away pretty quickly but probably will take it back up to the shop to have it adjusted

https://www.instagram.com/reel/C0ukQ...BmMjdhZWRiYQ==

I had a louder one. Only happened when cold start, valves closed. Dropping to gear killed it. Opening valves killed it (but then got much louder). Found heat shield was touching part of the mid. Addressed that and rattle went away for the most part. There is still more vibration at cold start but the obnoxious rattle went away. I'd have them check that while up on the lift.

Ravenseal · 12-14-2023, 04:43 PM

A month in, still loving my AA single midpipe. Everyone I've met is in absolute awe of the sound signature. Went back to the shop to check all the clamps were still tight to spec after a few hundred miles. It was perfect. Don't buy anything else, folks.

mike@x-ph.com · 12-14-2023, 05:10 PM

Quote:

Originally Posted by Ravenseal

A month in, still loving my AA single midpipe. Everyone I've met is in absolute awe of the sound signature. Went back to the shop to check all the clamps were still tight to spec after a few hundred miles. It was perfect. Don't buy anything else, folks.

ojp5q · 12-22-2023, 08:43 PM

After careful consideration, I’ve decided to go with AA single non-resonated midpipe purchased from x-ph. Great deals over there and Mike if you’re seeing this, thanks for all the great advice on this forum! I’ll post some before and after once I get it installed 🤘🏼

kyrix1st · 12-22-2023, 08:45 PM

Stick with a proven solution that works on a track. Akrapovic for example.

AZG87 · 12-23-2023, 05:12 PM

Quote:

Originally Posted by Ravenseal

A month in, still loving my AA single midpipe. Everyone I've met is in absolute awe of the sound signature. Went back to the shop to check all the clamps were still tight to spec after a few hundred miles. It was perfect. Don't buy anything else, folks.

Very happy with AA and Mike as well albeit with the equal length not the single. She sounds mean in sport + with trans in D3 for just a midpipe upgrade.

mike@x-ph.com · 12-29-2023, 02:21 PM

Quote:

Originally Posted by ojp5q

After careful consideration, I’ve decided to go with AA single non-resonated midpipe purchased from x-ph. Great deals over there and Mike if you’re seeing this, thanks for all the great advice on this forum! I’ll post some before and after once I get it installed 🤘🏼

Quote:

Originally Posted by AZG87

Very happy with AA and Mike as well albeit with the equal length not the single. She sounds mean in sport + with trans in D3 for just a midpipe upgrade.

Thank you for the support

WhiteRqbbit · 01-03-2024, 12:29 PM

I got my Single AA Midpipe right before Christmas from X-PH and have been driving on it since then; it sounds fantastic, and I love the fact it's still pretty stock-ish sounding in comfort for my morning starts and drives out of the neighborhood. Maybe later, if I crave more, I'll get the rear section, too.

mike@x-ph.com · 01-03-2024, 04:08 PM

Quote:

Originally Posted by WhiteRqbbit

I got my Single AA Midpipe right before Christmas from X-PH and have been driving on it since then; it sounds fantastic, and I love the fact it's still pretty stock-ish sounding in comfort for my morning starts and drives out of the neighborhood. Maybe later, if I crave more, I'll get the rear section, too.

Congrats

dominoM · 01-03-2024, 08:50 PM

So I've been wondering about the single midpipe. I get that it sounds awesome, and that's a big reason we're getting them for our M2s. But wouldn't it increase back pressure due to creating a single-pipe bottleneck in the middle?

Ravenseal · 01-03-2024, 09:42 PM

Quote:

Originally Posted by dominoM

So I've been wondering about the single midpipe. I get that it sounds awesome, and that's a big reason we're getting them for our M2s. But wouldn't it increase back pressure due to creating a single-pipe bottleneck in the middle?

The single midpipe is wider than the individual OEM midpipes, hence the need for a larger clearance brace. You can very clearly see this on the pictures available on the AA website.

WhiteRqbbit · 01-04-2024, 09:48 AM

Not to mention, you are removing two 90-degree bends going to the single, which is also the lightest option and puts the weight on the passenger side.

dominoM · 01-04-2024, 05:29 PM

Cool thanks for helping me visualize in my head. The AA photos aren't the best IMO. Would be great to see a photo of stock vs. single installed from below. Maybe there's one out there -- so many midpipe discussions maybe I lost it.

Ravenseal · 01-04-2024, 05:31 PM

Quote:

Originally Posted by dominoM

Cool thanks for helping me visualize in my head. The AA photos aren't the best IMO. Would be great to see a photo of stock vs. single installed from below. Maybe there's one out there — so many midpipe discussions maybe I lost it.

Here you go bud.

dominoM · 01-04-2024, 05:57 PM

Quote:

Originally Posted by Ravenseal

Here you go bud.

Even better. Thanks.

ojp5q · 01-04-2024, 07:39 PM

Quote:

Originally Posted by Ravenseal

Here you go bud.

Got any sound clips? Mine is shipped but I can’t wait, haha.

Ravenseal · 01-04-2024, 09:29 PM

Quote:

Originally Posted by ojp5q

Got any sound clips? Mine is shipped but I can’t wait, haha.

mike@x-ph.com · 01-05-2024, 11:31 AM

Quote:

Originally Posted by ojp5q

Got any sound clips? Mine is shipped but I can’t wait, haha.

Let us know how you like it once its on the car

Chicanery · 01-05-2024, 04:24 PM

Just had non-resonated single AA midpipe installed. Sounds great! I was on the fence between resonated and non, must have watched a hundred videos of all the G8x models.. it's true the video audio do it no justice... It is not raspy, which was my ultimate fear, it's actually more subdued than what I was anticipating.

Next step is the Dahler valve controller for a little extra. Once I get used to that, might have to do the Remus axel back, still waiting to hear some examples of it since the promo videos are pretty much useless.

mike@x-ph.com · 01-06-2024, 01:31 PM

Quote:

Originally Posted by Chicanery

Just had non-resonated single AA midpipe installed. Sounds great! I was on the fence between resonated and non, must have watched a hundred videos of all the G8x models.. it's true the video audio do it no justice... It is not raspy, which was my ultimate fear, it's actually more subdued than what I was anticipating.

Next step is the Dahler valve controller for a little extra. Once I get used to that, might have to do the Remus axel back, still waiting to hear some examples of it since the promo videos are pretty much useless.

Congrats, glad you like it

daddyjaxx · 01-12-2024, 03:19 AM

Are there any decent equal-length AA videos out there?

daddyjaxx · 01-12-2024, 04:36 AM

Quote:

Originally Posted by daddyjaxx

Are there any decent equal-length AA videos out there?

This is the only video I found of a G87 equipped with AA's equal-length mid-pipe (OEM downpipes and OEM rear muffler).

12-14-2023, 04:43 PM	#46
Ravenseal Lieutenant Colonel 3091 Rep 1,897 Posts Drives: 2023 M2 6MT Join Date: Jan 2016 Location: Denver iTrader: (0)	A month in, still loving my AA single midpipe. Everyone I've met is in absolute awe of the sound signature. Went back to the shop to check all the clamps were still tight to spec after a few hundred miles. It was perfect. Don't buy anything else, folks. __________________ 2023 G87 M2 - Toronto Red \| 6MT \| M HAS \| CF Roof \| BMW 826M Forged Wheels \| Mishimoto Skid Plate \| Active Autowerks Single Midpipe Retired: 2022 M240i xDrive \| 2021 Audi RS5 \| 2019 Camaro 2SS 1LE 6MT \| 2016 428i GC \| 2011 BMW 335is
	Appreciate 2 AZG871153.00 MASHCT1369.00 Quote

12-22-2023, 08:43 PM	#48
ojp5q Private First Class 91 Rep 145 Posts Drives: F10 BMW 535 x-drive Join Date: Mar 2012 Location: Washington, DC iTrader: (0) Garage List 2011 BMW f10 535i x ... [0.00]	After careful consideration, I’ve decided to go with AA single non-resonated midpipe purchased from x-ph. Great deals over there and Mike if you’re seeing this, thanks for all the great advice on this forum! I’ll post some before and after once I get it installed 🤘🏼
	Appreciate 1 mike@x-ph.com27047.50 Quote

12-22-2023, 08:45 PM	#49
kyrix1st Colonel 2435 Rep 2,396 Posts Drives: G87 M2; E92M3 MT&DCT; M3 euro Join Date: Sep 2014 Location: nyc iTrader: (0) Garage List 2004 BMW Z4 [0.00]	Stick with a proven solution that works on a track. Akrapovic for example. __________________ Pass me if you can.
	Appreciate 0 Quote

01-03-2024, 12:29 PM	#52
WhiteRqbbit Private First Class 112 Rep 123 Posts Drives: BMW M2 G87 Join Date: Oct 2023 Location: NC, USA iTrader: (0)	I got my Single AA Midpipe right before Christmas from X-PH and have been driving on it since then; it sounds fantastic, and I love the fact it's still pretty stock-ish sounding in comfort for my morning starts and drives out of the neighborhood. Maybe later, if I crave more, I'll get the rear section, too. __________________
	Appreciate 0 Quote

01-03-2024, 08:50 PM	#54
dominoM Private Low Class 305 Rep 280 Posts Drives: G87 M2 ZB 6MT Join Date: Feb 2011 Location: Colorado iTrader: (0)	So I've been wondering about the single midpipe. I get that it sounds awesome, and that's a big reason we're getting them for our M2s. But wouldn't it increase back pressure due to creating a single-pipe bottleneck in the middle?
	Appreciate 0 Quote

01-04-2024, 09:48 AM	#56
WhiteRqbbit Private First Class 112 Rep 123 Posts Drives: BMW M2 G87 Join Date: Oct 2023 Location: NC, USA iTrader: (0)	Not to mention, you are removing two 90-degree bends going to the single, which is also the lightest option and puts the weight on the passenger side. __________________
	Appreciate 0 Quote

01-04-2024, 05:29 PM	#57
dominoM Private Low Class 305 Rep 280 Posts Drives: G87 M2 ZB 6MT Join Date: Feb 2011 Location: Colorado iTrader: (0)	Cool thanks for helping me visualize in my head. The AA photos aren't the best IMO. Would be great to see a photo of stock vs. single installed from below. Maybe there's one out there -- so many midpipe discussions maybe I lost it.
	Appreciate 0 Quote

01-05-2024, 04:24 PM	#63
Chicanery Driver 88 Rep 119 Posts Drives: United States Join Date: Dec 2014 Location: S. Florida iTrader: (0) Garage List 2023 G87 [0.00]	Just had non-resonated single AA midpipe installed. Sounds great! I was on the fence between resonated and non, must have watched a hundred videos of all the G8x models.. it's true the video audio do it no justice... It is not raspy, which was my ultimate fear, it's actually more subdued than what I was anticipating. Next step is the Dahler valve controller for a little extra. Once I get used to that, might have to do the Remus axel back, still waiting to hear some examples of it since the promo videos are pretty much useless.
	Appreciate 2 daddyjaxx113.50 MASHCT1369.00 Quote

01-12-2024, 03:19 AM	#65
daddyjaxx Private 114 Rep 70 Posts Drives: 2024 G87 6MT Join Date: Dec 2023 Location: Kansas iTrader: (0)	Are there any decent equal-length AA videos out there?
	Appreciate 0 Quote