I have the Spintech Sportsman XL on my Ram 5.2. It's not their loudest but I didn't want their loudest. It has a little throatier sound at idle and when accelerating a nice rumble, not too loud but louder than stock and noticeable. I can tell when the truck is coming home a block away, it's not loud but you can tell the sound. I used it at the recommendation of the guy at the muffler shop. A friend wanted to dual out his Ram and the guy told him fine, I'll do it, it's your money, but for less I can put a 3" cat back pipe and this Spintech and you'll get the same gains for less money. I think it helped a little on the SOTP dyno. Check out their web site, go to Yahoo and search for clips to hear how they sound. If I had the spare change to replace the muffler on the '** I would put on a Spintech.