Hey I have a '01 Cobra w/ Flowmaster Delta Flow 2 chambers and the rear cats are completely cut and welded over with pipe, and the front cats are gutted. A buddy of mine with a 99 cobra has the same stuff done except his front cats are not gutted, it's just welded pipe over where the cat was. His is a tad louder than mine, and i'm wondering why, b/c im pretty sure we have the same mufflers, b/c i believe flowmaster only made the delta flow for the irs equipped cobras. whats going on?? if i go to a bigger midpipe, such as a 2.5 inch, will that get it louder?? THanks.