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      04-05-2010, 02:47 PM   #35
mwahlert
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Drives: 2008 335i
Join Date: Apr 2008
Location: Durham, NC

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Quote:
Originally Posted by shiv@vishnu View Post
Also, the stock exhaust on the 135 is hopelessly restrictive. Only 1 muffler, not two like the 335. You're traps are already beyond what I would expect with your mods.
how have you found the factory 335i exhaust to flow once the secondary cats have been removed and catless downpipes have been installed?