Thanks guys for the reply. I'm using the stock turbo as I'm not too keen on upgrading, but will upgrade the waste-gate flapper, fuel system to run e85, 1000cc injectors, hot side 4" intake, battery relocation, Intercooler, 20% underdrive pulley kit, 4" dump and h/f cat. I currently have an Xforce cat back 2 1/2 inch quad system that I've removed the rear mufflers and have straight pipes and just left the centre sports muffler, but thinking of removing the centre muffler and fit 2 hot dogs and replacing the rear section with 2 sports mufflers for a unique sound OR just fitting a complete 4" turbo back exhaust and split after the rear diff to exit on both sides. I love the quad tip outlets Hopefully that would hit the 350 RWKWS..?