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Old 02-09-2017, 09:09 PM   #4
rontnak
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Join Date: Apr 2014
Location: Fresno, CA
Posts: 8
Quote:
Originally Posted by Dave80GTSi View Post
I assume that the primary manifold cats have not been touched, so that your Check Engine light does not come on?
Correct, just the secondary cats are removed and replaced with the test pipes.
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