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      07-31-2012, 07:07 AM   #1
novablackm3
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x5m mid pipe mod

Stock x5m/x6m mid pipes


compared to m5/m6 mid pipes


I've recently added down pipes and the exhaust note is a bit louder but im looking for a bit more w/out changing out the stock muffler.

I've heard a stock m5/m6 exhaust and its pretty aggressive but not too much. Upon reviewing both the x5m and m5 exhaust i realized the x5m has an additional muffler and possibly cat on the mid pipes. To compare on a E90/92 m3 the car also comes w/ 4 cats, 2 primary and 2 which are normally replaced with X pipes for 2ndary cat removal which increases exhaust note but also performance.

Akrapovic's midpipe design


Supersprint midpipe design


I may start replacing one at a time to see what a good compromise is. Anyone else mod their mid pipes ? any decent exhaust shop should be able to do it for a reasonable price
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      07-31-2012, 09:06 AM   #2
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humm....interesting, there is a forum member selling his full oem exhaust, but the mid-pipe looks different than the diagram you have. Take a closer look at the resonator from his fs linkhttp://www.xbimmers.com/forums/showthread.php?t=676203
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      07-31-2012, 09:25 AM   #3
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alrighty then LOL i should just get on the ground and take a look @ mine. they still look like they have resonators but not a full cat or muffler
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      07-31-2012, 07:45 PM   #4
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Quote:
Originally Posted by BabyBlack
humm....interesting, there is a forum member selling his full oem exhaust, but the mid-pipe looks different than the diagram you have. Take a closer look at the resonator from his fs linkhttp://www.xbimmers.com/forums/showthread.php?t=676203
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      08-09-2012, 06:15 PM   #5
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I took my resonators out for $120 at a local shop. They didnt really add much sound. Maybe a hair louder. Everything else is stock.
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      08-17-2012, 10:56 AM   #6
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Quote:
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I took my resonators out for $120 at a local shop. They didnt really add much sound. Maybe a hair louder. Everything else is stock.
Just replace it with straight pipes?
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      09-26-2012, 10:20 PM   #7
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Just replace it with straight pipes?
No i put a H pipe in it's place.
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      12-08-2012, 05:33 AM   #8
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No i put a H pipe in it's place.
Aside from it not being any louder did you gain any power?
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      12-08-2012, 08:21 AM   #9
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why an H pipe? why wouldn't you put an X?
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