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Originally Posted by 335if30uae
thanks .. running with JB4 stage 2 -its great... but feels stock cat and dp is restrictive...at the same time if challenger HFC dp throws codes.. it a worry for me.. I will wait till more are installed..
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I'm 99% sure it will throw a code (although JB4 Stage 2 would delete it). It's just an exhaust code saying the the cat isn't doing as good of a job as it should with filtering emissions (which is obvious since that's how you're getting more flow).
But should you take it to the dealer and the CEL pops up they'll quickly figure out that you have an aftermarket DP. They can't exactly void your whole warranty because of it (maybe exhaust related issues should they creep up). The general idea is that if something breaks and they can attribute it to a mod then it's on your dime to fix it. Not sure what a freer flowing down pipe could break though. Rumor is that it's actually easier on the turbos but I've only heard a person or two mention that as it's not usually the selling factor.