Thread: N54 downpipes
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      01-04-2013, 03:59 PM   #12
Colt
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Drives: 08 135i 6MT
Join Date: Jan 2012
Location: Maryland

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Quote:
Originally Posted by 135Pats View Post
Sure you can, you'd just need to swap out to the OE downpipes for testing...Granted that is neither cheap nor convinient, it would probably come down to labor costs in your country, and how often you have to pass emissions testing.


I was thinking of going the catted downpipe route and people haven't passed emissions this way either. So I said screw it, do my emissions before Feb 16th, install the catless DPs and not worry about it for 2 years.

OP, you have to remember that you aren't guaranteed to pass emissions with an aftermarket catted DP, possibility of still failing emissions
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Quote:
Originally Posted by Nate4641 View Post
looks like unicorn vomit.
For Sale: 08 135i SR 6MT, PTF Tuned