[OGOverkill]

I have them installed on my CS. Spund is probably 10-15% louder, they do sound great.

Install was ok. Unfortunately the bolts to mount to the midpipe were welded on an angle so I had to cut the welds on the bolts. Not a big deal, but I had pinched an O2 sensor prior to doing this...

[mike@x-ph.com]

Originally Posted by yoandry

I know, but not what Im looking for, Im past install. Was looking for sound/rasp feedback.

got it

[Wtfitzvi]

Originally Posted by Jims M3

I have GESI pipes on my F80 no compromises and no smell.

Any drone with these? Ive been eyeing them now for a couple years but id hate to drop that kind of money and not be satisfied.

[mike@x-ph.com]

Originally Posted by Wtfitzvi

Any drone with these? Ive been eyeing them now for a couple years but id hate to drop that kind of money and not be satisfied.

Downpipes will amplify your existing sound. If you have a drone now, it will make it more noticeable.

[christianb5s4]

Mike - If AA GESI downpipes add let's say 10-15% volume, how much additional would the MAD 200 cell DPs add volume-wise?

[Vectors2final]

Are we sure they are rated for only 850 WHP as a system? Because the GESI ratings are per catalyst.

This is even referenced in AA's link to these DPs.

https://store.activeautowerke.com/pr...ns%20per%20cat


The real question is, have they done any testing beyond those numbers?

[mike@x-ph.com]

Originally Posted by christianb5s4

Mike - If AA GESI downpipes add let's say 10-15% volume, how much additional would the MAD 200 cell DPs add volume-wise?

Dont have exact data but on stock turbo, there wont be any power difference between the two.

on upgraded turbos, the 200 CEL will make 10-15 whp more than the GESI 400 CEL

[christianb5s4]

Originally Posted by mike@x-ph.com

Dont have exact data but on stock turbo, there wont be any power difference between the two.

on upgraded turbos, the 200 CEL will make 10-15 whp more than the GESI 400 CEL

That's also a helpful data point.

I was asking more about the level of sound / volume increase from GESI to 200 cell if you can share your guestimate?

For example, if stock to AA GESI is a 10-15% increase in exhaust loudness, how much louder are 200 cells versus GESI?

[mike@x-ph.com]

Originally Posted by christianb5s4

That's also a helpful data point.

I was asking more about the level of sound / volume increase from GESI to 200 cell if you can share your guestimate?

For example, if stock to AA GESI is a 10-15% increase in exhaust loudness, how much louder are 200 cells versus GESI?

got it, i have had both and i think the sound difference is 5-10% between the 2

[M4Lou]

Originally Posted by docjavier

I want to know this too.

What about leaving the stock DP and getting a JB4 instead? I have a resonated MP and Axel back already. Can't do the unlock yet.

I'd think a decent piggyback would be a better ROI as compared to higher flow downpipes.

[mike@x-ph.com]

Originally Posted by M4Lou

I'd think a decent piggyback would be a better ROI as compared to higher flow downpipes.

if your only concern is power and dont care for the sound upgrade, the piggyback is the better investment

[christianb5s4]

Originally Posted by mike@x-ph.com

got it, i have had both and i think the sound difference is 5-10% between the 2

Thank you Mike, that's very helpful.

[mike@x-ph.com]

Originally Posted by christianb5s4

Thank you Mike, that's very helpful.