SMOTE: I have the 4" w/o the muffler and it sounds great
I was also very happy with how fast it got to my house, it took four days. It has been on 1 week now and i like it alot. The only thing that i'm not happy with is the tail pipe the bend is not the style that i would have liked, but that is not going to be a big deal. One of the guys on my fire department is going to help me cut and weld it the way that i want. I'm not sure how i can explian it. The bend looks like it was for a daully if you know what i mean.
MSTIMAC: The hangers are prewelded. They did not use all of the stock hangers but once i got it all together it is nice and secure.
The only thing that i would suggest is that you dont try and do this job like i did. Ihad been awake for more than 24 hours so when it came time to cut one pipe to make it fit the short box i messured four times and still cut it 2" to short.
If you have a long bed this wont happen to you. I'm just glad that i didnt cut 4'' to much.
As you can tell i,m new to TDR and i,m not sure if this helps you guys.
Rob
PS. I wish you could see peoples faces when i pass them on the interstate at lets say 90 it is loud enough to wake the dead

Around town i dont think that it is too loud.