Quote:
Originally Posted by SS_Aylem
I have this flowmaster american thunder installed with the scavenger x midpipe for the NPP and decided to delete the secondary cats and the next day I got a CEL
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take it back to the muffler shop, that CEL is most likely from improper welding resulting in a leak, according to a couple people who had the same CEL after deleting the secondaries. easy fix. more than likely they didn't weld the top correctly, which I've read is hard to reach I guess.