I am interested in purchasing a cat-back system for my stock 03' Cobra convertible. I have reviewed many exhaust threads and am leaning towards the Borla Stinger system. I have heard it sounds best with the stock H-Pipe and I will probably not swap it out for an X-Pipe as I do not want an obnoxiously loud car, been there, done that. How much HP would I be passing up by simply utilizing the Borla cat-back and stock H-Pipe ?
