IMO, go with an MBRP duals setup, turbo back. Having an aftermarket exhaust will not void your warranty (provided you bolt the cat back in place when you go for service) You are looking for the T409 stainless, non polished. The fit and finish on the MBRP systems is great. You will have to buy the system with muffler, and then buy the muffler delete pipe seperate which is about an additional 100 bucks. I run mine with a cat delete pipe and kept the muffler, theres pics of my setup in my gallery. My .02 cents