[JL8Jeff]

I think I went with the TSP non catted y-pipe with the used XS Stainless headers (and they had the driver's side collector cut short) on my old 2000 SS and I bought the cats separately and cut the y-pipe myself to get it to fit. It fit pretty good, even with the short header. I clamped everything up and it worked well, I never got around to having any of it welded. I basically did the same thing to my old 96 SS. The biggest issue is if your stock motor mounts are worn, it will allow the engine to move and the headers/y-pipe will hit the floor. You definitely want new motor mounts with headers. It's nice when everything goes right into place, but the f-body with dual cat y-pipe is so tight to the floor, you will most likely need to tweak it to fit the way you want it.