I got someone interested in buying my cat back dualls, so I was thinking about getting a single 5 inch. Would this benefit me with my sig ? My summer plan is to get a Smarty,CFM intake manifold,Goerend TC, Valve body, and a Fass fuel system. I just want to buy the right exhaust for the right amount of power. Or should I just go with single 4 inch? I like stacks, but the wife doesn't like how loud they are, and I'm not sure I would like the noise factor either. I don't for see me going beyond to much more power than the smarty,but than you never know.