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      12-05-2011, 02:45 PM   #3
MDORPHN
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Drives: AW 1M
Join Date: Oct 2010
Location: Wash, DC

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Quote:
Originally Posted by Texas F1 View Post
On the stock pipe, you can see a restriction just aft of the connecting flange (downstream from the resonator). When COBB had my car on the dyno a couple weeks ago, they indicated that this part of the stock cat-back appeared to be causing a small issue and would likely be improved with an aftermarket cat-back. I understand that significant gains are more likely to come from the downpipes and cat area, but I've ordered an Eisenmann cat-back and will see if that makes a difference and, if so, exactly how much.
Do you know whether a mid-pipe -- either stock off a N55-powered 135i or the Berk Technology piece -- would eliminate this restriction?

Thanks.

Neil
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