This is a discussion on Y pipe question within the Exhaust forums, part of the Performance category; v Will a 3" reducer fit on the end of my Y pipe? Vehicle info: 1996 Chevy Express van , ...
Last edited by Mobilesport; 03-18-2012 at 10:32 PM.
I have no clue what size the stock cats are on a van, but I happen to have the stock y pipe and cats off my Silverado 350, and it only has 2" pipe necked up to 2-1/4 into the cats. I also happen to have 3" to 2.5" reducers on hand.
Reducer under pipe:
So on a silverado, no, even with a welder your couldn't properly make it work. What size are your cats?
I would just take it to a muffler shop and have them make me a custom y pipe but i dont think they'll work on it since they would have to remove the hollowed cat
Last edited by Mobilesport; 04-06-2012 at 12:03 AM.
the 3" should fit on the van the only problem you may run into is at the front of the cat you'll want to cut as close to the weld as you can and some times the pipe is'nt exactly round there , they tend to be a little egg shaped. the id of the pipe you're replacing the cat with should be 3" and i belive its also the same for the back side.