How in the crap you get the 4" down pipe in with out lifting the cab?? I worked on that Friday all day and could not get it in. I finely put the 3" back in and shortened it and hooked it to the 5" system for now.
when i put mine in of course it was very tight...i could not do it myself so i got a buddy to stand up top and help me guide it up from the bottom....it took awhile but we finally got it (took a lot of wiggling haha)
on the 06 f250 i had, i had to jack up the front of the truck.. it was tight, but it went right in. btw. i did this with no help, in the yard at night and with drop lights! once the rest of the banks monster exhaust was on, it was welll worth it. left the cat out also. just be carefull not to crack the y pipe.