:word: Im running 3" pipe from my converter back with a 4" round magnapack for my muffler on my truck. I personally think it sounds perfect. Its definently louder and meaner than all the other trucks around, but it doesn't have the annoying raspy sound you would get if you ran straight pipes. Plus, cruising on the highway its nice and quite...till you start running 75mph and spinning 2200-2500 rpm's

...then it gets a little loud. But when your running in OD anywhere from 55-70, it sounds just fine.
I would think that running this muffler with a set of LT's would be pretty fuckin loud...probably to loud lol. But, its whatever your taste is. I get many complimants from people about the tone of my truck...and Im still running the factory manifolds. Most people don't believe that Im running a single system, not duals and that mine is better sounding then theirs.