after putting my new custom kooks longtube headers and y-pipe on my check engine light came on. this was like a month after! i also have a k&n cold air intake. i am wondering i now have to take it to a dyno shop to recalibrate my mapping? i cant trust any of the dealerships around me. i brought my truck to the better of the 2 and they spent 3hrs looking at my truck and all they could find was a small exhaust leak about 14" after my right catalytic converter right at the clamp. so they put a new clamp on it and called it good. 200 bucks later im still pissed... i originally thought i found the problem when i saw a half melted line that went to my transmission. then i was told i was just a shifting cable and that wouldn't cause my problem. and to top it off my inspection was up on 4-30-10, so im kinda screwed right now... any help or any ideas would be great thanks...