Quote:
Originally Posted by MDORPHN
OK, I suspected that you would have referred specifically to the secondary cats if that was your concern.
Since the constriction is behind both the secondary cats and the resonator, it would be the rearmost section of the exhaust -- entailing the single pipe running to the muffler -- that would need to be replaced in order to "free-up" the system.
Neil
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I will just comment that everything I have read and heard indicates the mid pipe with its secondary cats is far more restrictive than the rear section. Keep researching.