i recently put on bbk long tube headers for my car. i also have a mac prochamber, and cat back system, and a k&n cold air kit. i know it's not much, but i spend more money on my mountain bike. don't ask how much my bike costs...anyway, i here people say if you get long tube headers, you should get your car tuned. i haven't gotten it tuned, but i don't know how it would effect it, but for some reason, my car has gotten worse than it was when i first put the long tubes on. the first problem i had was that i would pull out of my lane, and the car would just start to cut power, and i'd have to down shift to give it gas to make it run, or the engine would shut down. another one is, the sound of my car. it sounded great after i put them on, especially with my prochamber and mac cat back system. classic hot rod type car sound. now it sounds like it's really weezy, and like air is shooting out somewhere. the header bolts and tightened, the connections are tight(headers to pipe, and pipe to cat back), and now it sounds like crap. so now i don't know if it's really a tuning thing or if there's something else i should know about. i don't want to waste money(because i have none) for a tune right now, but would it solve the "engine just cuts power and shuts down" and "my car sounds crappier every day" problem? if someone knows, let me know. sorry for the big book i just wrote.