If you don't want it really loud(which it probably is right now if you have stingers) than leave it alone. If you want louder than you have now and still deep, mean and growly than go with catted h. If you want a more exotic sound go with an x. Prochamber seems pretty good with stingers too from the ones I've heard. And my mrt-catted h/stinger combo do not sound like glass packs! There is an occasional glass pack rap between 2500 and 3000rmp at initial wot and only depending on air and engine temp. They rap for a second or less and then sound fricken unreal. I've had people pull up next to me on the highway at least ten yimes in the last month since I put this combo on to tell me my car sounded great! Guys in their 20's thru 50's! Check fush's terminator site to hear stingers with a prochamber and hear them with a catted x. http://03cobra.g33ks.org/staticpages/index.php?page=20040116143435264 If you use the search function there are also a few clips of mrt catted h and stingers on the svt site(this site) and I almost forgot STINGERS ARE LOUD!