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Have an '04 with k&n typhoon. Interested in getting Injen exhaust and thats all im doing. No test pies or anything like that. There are no dynos around my area so no A/F testing. So basically if all I have it intake and exhaust is that going to make me run lean? Will resetting the ecu make a difference and be good enough? Thanks for any help.....I really want the exhaust, but dont want to stress the engine. All comments apprieciated!