Shorty25

Hello,
Got a question. Right now my 01 cummins has a set of 5 inch stacks. Under the truck however still has the stock size exhaust which is nice in a way cuz the exhaust is split into the stacks under the bed which still allowed me room to put a tool box in the bed of my truck between the stacks. I would like to upgrade the exhaust to a 4 inch system from the turbo back and use the stacks that I already have. Is there a kit that makes it possible to split a 4 inch exhaust under the bed without relocating the fuel tank? Or has anyone else done something similar that might be able to help me out?
Thanks
Shorty25

Load Hauler 04

Most of the kits I have seen are ones that set in the bed behind the cab. I have seen a couple of guys on DTR that have split them under the bed and built there own system. Good Luck!!!

rage_blue

I think if you get a 4 inch stack kit mainly for the y pipe you could put the ypipe under the box, just may have to hammer the pipe a little to make it fit between the box and frame, maybe a heat sheild to protect the tank? I've been thinking about doing the same thing, just haven't measured to see what it will take.

Shorty25

The only thing I'm really concerned with is how tight the 90 degree bend is that goes into the stacks.

Joe Diesel

a 90* 4" pipe will flow with no problem if thats your concern

Shorty25

no my concern is getting the 90 to clear the frame rails and the tank