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      10-17-2011, 04:49 PM   #14
Private First Class

Drives: E92 M3
Join Date: Oct 2009
Location: San Diego

iTrader: (3)

Originally Posted by isugoo View Post
how about smog test? will I pass with gutted 2nd cats?
I am 99% sure it will pass the CARB emissions (sniffer test) The reason I am so sure of this is I did the same thing on my Audi S4 and it smogged with no problems. It passes visual inspection of course because the midpipe looks 100% OEM. The secondary cat is just there to burn any leftover crap in the exhaust stream that the primary cat didnt burn up, but these engines are so efficient and the primary cat does a great job once the vehicle is up to temp. that the secondary car hardly does anything at all except restrict exhaust flow.