I am planning on a major buildup of my 4.2, and I need to redo the exhaust system. I want to run true duals in 2.5" pipe from the S6Motorsports headers to hi-flow cats to the Supertrapp mufflers (exit in front of rear wheels on both sides of truck). I know that true duals can result in lost low end torque, but I want to buy the Supertrapps so I can tune the exhaust backpressure for the best performance and sound gain. Does this sound like a resonable exhaust system? ANY ideas or suggestions would be very appreciated. Thanks