i just bought an '06 mustang gt and i plan on keeping it stock except for the exhaust.....i want it louder....what size is our stock tubing pipe???? should i get the whole exhaust minus the headers or should i get just the mufflers replaced???? i had a 95 cobra with a 2-1/2" h-pipe w/ flowmasters pro-dumped.... i'm not wanting them dumped, but i want to be able to hear them....any help would be great....thanks jimmy