The problem is the bracket that bolts to the trans and holds the front-pipe. If you take off the 2 bolts holding this on and get it out of your way the front-pipe with the cat will come out of there easily. I've done 2 exhausts in the past couple weeks and removed both the same way. My instructions said to cut the pipe after the cat rather than unbolting the flange and taking the bracket off, but since I only had a grinder to cut with and could get up in there I had to find a way to get it out without cutting. Hope this is helpful for some one, and because of this I was able to sell both stock front pipes.My truck has a cat and no way to remove the cat and the front pipe without cutting them. I was able to just rotate it and push it aside, it was tight for room but it worked.