i put a 2 1/2'' magnaflow muffler on mine and it sounds great i have just a 3inch pipe about a foot long at the out flow side i have noticed a little more get up and go but nothing drastic but noticible. <img src="/forums/images/graemlins/cheers.gif" alt="" />

93 montero sr 3 inch body lift 31x11.50 super swamper ltb, 2 8inch 130 watt pro comp off road lights, 2 55w lights on the rear bumper, rear air locker, magnaflow exhaust muffler,superwinch manual hubs,15x8 black rock crawlers (steel)