Applellial Report post Posted March 7, 2011 Has anyone disconnected the factory exhaust systems cat bypass vales? If so how did you trick the computer from setting a check engine code? Quote Share this post Link to post Share on other sites More sharing options...
Ryan@fabspeed Report post Posted March 8, 2011 Has anyone disconnected the factory exhaust systems cat bypass vales? If so how did you trick the computer from setting a check engine code? Primary or Secondary Cats? Quote Share this post Link to post Share on other sites More sharing options...
NOSZ06 Report post Posted March 8, 2011 The vacuum butterfly valve is located after the first cat and before the second cat / muffler. Quote Share this post Link to post Share on other sites More sharing options...
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