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      10-03-2012, 07:58 PM   #43
Andy H.
Andy H.'s Avatar

Drives: 2012 535i M Sport
Join Date: Aug 2012
Location: San Antonio, TX

iTrader: (1)

Originally Posted by bb2405 View Post
In California it is illegal to drive without a Cat, but some will take the risk in order to gain performance
I don't think that answers his question. I get that there is a benefit of switching out the stock catted downpipe with a catless to improve performance.

The real question is, why buy a catted downpipe to replace the catted stock downpipe?

(I'm glad the question was asked. Because, I was wondering the same thing) What is the benefit?

Also, has anyone concluded if the installation of a catless downpipe can be successfully accomplished without causing the code alert (whatever you call it) from appearing on the dash display?