I want a deeper sound on my '08 R6. Not looking for a performance gain. The stock exhaust with the ex-up comes out like a diesel exhaust, just a constant rush of air. I want to be able to feel the punch of air with the firing of each cylinder. I plan to leave the the stock system on(header,converter). I'm thinking of either the Graves stainless steel slip on or the GYTR. Anyone have any thoughts? Will the thing back fire on decel?