i have a silverline muffler that i took off of my kit and am running straight pipe now. i put maybe 500 miles on it if that... where are you located in kentucky, i am in lexington and would get rid of the muffler pretty cheap. it fits 4 inch exhaust so you could use it with your stock exhaust.
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99 3/4 Ton SB QC 4x4- Quadzilla Adrenaline w/ Pulse, 130hp sticks, Fass Pump, Valair Feramic Single Disk, 4 inch exhaust to 6 inch tip. Dying for a dual disk and more air!!