Damn. This sounds like a custom job, something i probably cant do myself. Ill have to look into high flow cats because i keep hearing different things here if they're legal or not. I do need to pass emisiions though so. I havnt taken a look at the exhaust system on the truck, but since you said cats, plural im guessing it goes Header -> Cat -> y pipe -> muffler? So, im basically buying a whole new system, though im not sure about the cat, i might need to keep it. But im guessing they dont sell something like a catback thats prebent for the k5? Ill have to have a shop do it? I just wanna do most if not all the work myself to save money.