just got done installing the FBD 4" Dual Exhaust. IT SOUNDS AWESOME!!! Money well spent!!! It took about 4 hours..and that's just because I had to literally lay all the pipes out on the ground before I installed them. The directions where fairly clear (instructions with diagrams or pics would have made it go some much faster) ...but I had to piece the puzzle together. and the duals are a tight fit. the spare doesn't fit all the way up..but it will work. One thing though...I had what seems to be an extra part. had no clue where it when (again a diagram or pic showing where it went would have been helpful). It's a 90deg bent rod about 8 in long...any ideas where that was supposed to go? all and all I'm very happy...and the install went ok..and it sounds AWESOME!!!