Are headers interchangeable from TBI to Vortec or visa-versa or do they have to be specifically for 96-98 5.7L?
I'd like to know as well. I'd like to put a good single exhaust on my 97 Burb and I don't understand why it has dual pipes all the way to the muffler unlike my 93 XCSB truck. I can get a single in/single out Flowmaster for $50 on clearance at a local shop, but they don't have any dual in/single out muffler of any kind. I would like to pick up a junkyard Y pipe and fab a good single exhaust with mandrel bent pipe and the cheap flowmaster. Would that be a bad idea? Would I be better off building a true dual system off of the existing system?