Quote:
Originally Posted by steve99
 thought you had stock header, and a catback. Unfortunately it possible to get P0420 with any aftermarket header, catted one vastly reduce possibility but no 100% guarantee, few people in this thread get the CEL but many dont. The CAT is likely ok if its a speedfactory header The speedfactory cat is much more robust than the stock ceramic cat in stock header.. Check for exhaust leaks though and always use new gaskets when fitting a header reused gaskets will almost certianly leak after a while causing problems. |
Thanks for the advice! I did use new gaskets thankfully. I also bought this OBD2 reader just in case, turns out I'm glad I did haha. It's something I am willing to live with in order to have that UEL rumble
