Quote:
Originally Posted by DarkestBuddha
i have the ft86speedfactory catted headers with perrin Op and 3"perrin catback
code is P0420
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You're going to need to disable P0420 DTC on your tune to get around that. As Jeremy from FT86SF has said himself, they designed the catted header to not throw CEL only on the stock intake/exhaust. While you might get away with it, it's likely only a matter of time before P0420 pops up.