Well yesterday afternoon i spent in the garage pulling part of my exhaust off and replacing it with a nice piece of 4in ss pipe that i got from MBRP. Let me tell you, i had the muffler that came with the kit on there some tight, it took me the better part of and hour and a half to get that thing off of the tail pipe and a short connecter pipe, but i must say that the time spent was well worth it. Putting it back together only took ten minutes, it was a piece of cake and i am glad i did it. The truck sounds 100% better straight piped then it did with the muffler on there, only wished i had did it the first time around. People give me a look when driving around, i think they are expecting to see a dump truck or big rig, it is great, got to love that cummins.