There have been a few posts recently about people looking for mufflers. I guess most people want loud vs. quiet, but this might interest a couple people. Walker has some good rebates going, or at least it looks that way to me.

http://www.walkerexhaust.com/promo/promotions.asp

Rock Auto has a QuietFlow muffler for a 98 1500 (WALKER Part # 21351) for either $79.79 or 46.79 (one year warranty/regular inventory vs. 30 day warranty/wholesale inventory). I think I'm gonna have to pick one up, running with no cat or muffler is too loud for me.