Quote:
Originally Posted by mikeyg36
Instead of gutting the NPP have you considered a set of headers? The stock cats soak up a lot of sound. You'll get a check engine light without having a tune but I'm sure one of the o2 extender or spark plug de-fouler methods work on this car and fix the issue. That's what I'm going to try with mine.
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My origional plan was intake and cat back first then headers and high flow cats a few years latter. I always figured that headers were more risky and that you'd definitely need to tune it afterwards, so I was leaning more towards the cat back since I know you can run those with no tunes.
Are you talking about doing high flow cats or deleting them and putting in a test pipe? I have seen a video with the secondary cats deleted and there was a huge sound difference but that always worries me about passing inspection, we have to do emissions every two years in VA.
Another reason I was leaning more towards the cat back is because I saw a stock NPP and the muffler is rediculously large and the pipes and crushed flat making it look like it only lets about half of the exhaust through, maybe even less.
The cat back runs $1500-1800, what would headers run?