ZZ, I have a question for you. I'm going to mod my LS3 in stages. I'm going to start with an axle back exhaust followed with headers in about 6 months and then much later either a supercharger or turbo. MY concern is this. Am I better in doing a catback first then simple headers or should I do the axle back and header with xpipe that meet up with the axles? (I really like the ARH and Borla setup) Also, if I decide to go with a turbo, would this pretty much dictate that I have to change out the exhaust system? Thanks