quick question..s4 rx7,,vert..daily driver..i was goin to convert my dual stock exhaust to a single exhaust from the cat back..so keep all the stock cats and just running a single pipe from the cat out with a n1 style muffler..does anyone have any idea on how it would sound...is it gunna sound LOUD..or..decent..jw.thanks

 

If you keep the cat and exhaust manifold the noise shouldn't increase too much. It will probably sound like *** and you gain any significant power.