I have a 96 Chevy K1500 Z71. I was curious if anyone has replaced the entire exhasut system: Headers, cats, piping, and mufflers. I am confused about the cats. are there any cats out there that come without all the piping. The only ones I can find are ones that arent legal on post 96 trucks or the ones that come with the piping already done. If anyone can let me know there experience any info would be appreciated.