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Sounds like I will need to swap them back and forth.
ya it might be funnnn. does ur car accelerate better with the headers?? bcs i was thinking of getting a mid-pipe to delete the cat on my stock headers.
swaping these things back is not too bad actually... my friend has to swap his turbo kit and stuff back everytime he goes to smog... good thing he decided to go na-t and he uses emanage for tuning, all he has to do is load the stock map and its all good, but it takes a lot of time and a lot of money... My friend looks at it as it is time to change the seals and gaskets
Should pass with exhaust if you keep your cats on. No point in getting headers IMO. Visual half the time they dont look or cars. they only really check when you go to the smog ref