Troutly, I also dont like it too loud, especially cause I'm in my truck 8-10 hour a day, stop and start in a residential area. At first when I got it , it was a little loud, so i bought a resonator (cherry bomb) in place where the cat was suppose to go, that helped, but I still wanted it quieter, so i took that off and welded the cat back in, that did the trick, It quieted it down and also built a little more back pressure, Im pleased with it now, like Boot said its in the muffler, and if anyone would know it would be him. This might sound stupid, but call me tomorrow 228-216-0900 Ill put my cell phone on in the truck rev it up with the windows up and down, then go out side and let one of my workers pull away and then get on it a little so you can hear the sound level. Then give Boot a call, he will set you up.
Boot thanks for the info, Ill check it out. Thanks Jeff