98 2500

I am still doin some research on how to do my stacks. I ordered some 5"x42" mitre cuts and their on the way. I am gonna do a 3 to 4 coupler and run the 4" pipe back.


How are guys getting the split to come out the center of the bed, or could i just go straight up from the natural exhaust line and have one side longer, then cover everything so its not noticable?


Also how do you actually attach the stack to the pipe, do you need a 4 to 5 coupler and then use a band clamp?


How do you mount them to the bed? In the same respect, is the whole exhaust supported by the mouting of the stacks?

wannadiesel

Justin- If you look at the stack pics, you'll notice that guys just come up through the bed right over the exhaust. This does make one pipe longer than the other, but it doesn't seem to matter. You will need couplers to attach the stacks to the pipe. You don't need band clamps, plain ol' muffler clamps work. A good suggestion I read was to make the vertical sections of pipe much longer than necessary, one foot shorter than the stacks. This keeps the stacks cool. From what I've seen, guys make brackets to hold the stacks. Some mount them to the bed rail, some mount them to the floor. I'd suggest a hanger under the bed to hold the exhaust, I wouldn't hang it off the stacks.

Dieseldude4x4

Check out the link to my pics.

https://www.dieseltruckresource.com/...cat/500/page/1

Shovelhead

That is a VERY clean looking setup.

(And it sounds good too.)

Jambbii

Dieseldude4x4, Did you attatch the stacks by the bed rail? If so are they cool enough that they don't mess up the paint?

98 2500

it looks like your y is coming up in the center of the bed, did you turn the exhaust then go up in the middle?

Cummins4u

My setup basically looks like Dieseldudes other than I welded the stuff in the bed and my y pipe comes up more on the passenger side (natural exhaust line). I did have to shorten one side of the y pipe. If I were you Id be sure to get a Y with a divider plate otherwise possible uneven smoke, dont ask how I know. I made mine up with a 4" downpipe, some stainless steel flex, and a 45 degree elbow thats welded to the y pipe. Flex connects the downpipe to the y, and cant be seen unless you crawl under the truck. Stacks are hung with peterbuilt polished stainless clamps that mount to the bed. Right off the Y pipe I used 4-5 adapters, a short piece of 5" on the driver side, none on the passenger side. Elbow mounts directly to ypipe on the passenger side. I used band clamps to attach the stacks to the elbows. My toolbox covers up the plumbing, planning on making a piece of aluminum to cover the gap. Good luck with the setup. If you need help theres more than enough of us here to help ya.

Derek

Dieseldude4x4

They don't really get hot enough to mess up the paint. The clamp bottom keeps the pipes off the paint a little ways.
The exhaust comes down the right side off the turbo and 45's over to the splitter which has a 90 on the bottom of it.
Works real well and sounds real good, lots of turbo whine.
We did the same thing on my sons 3500 too.



https://www.dieseltruckresource.com/...cat/all/page/1

GIT-R-DONE

Here is how I did it. 4" pipes with a 18" muffler and resonator. "T" pipe is more to passenger side than center. Sounds good as well, but not obnoxiously loud.

GIT-R-DONE

Pic #2

Scotty

I'm looking at having the single pipe come up in the bed on the passenger side and then put my 4" inline exhaust brake there, then run a 90 off the pipe after the brake. Or put the brake under the truck and 90 up after it.
Thinking out loud here.

My only concern is I have a slip tank that is notched out for a roll top [on previous truck] so I am thinking with the correct plumbing and enough space between the tank and the pipe, I could run the pipe to the left side in the notch area of the slip tank and then a 90 for the stack.

Joel, how hot do the pipes actually get?

Anyone know what the safe space requirements are for exhaust near a tank?

Or would it go BOOM?

98 2500

hey git-r-done you ran that throught the tonneau....i wanted to do that. how close is it to the cover, how hot, no melting, got any pics from above as well

dsljunkie

Scotty,
I got about 2-3inches of clearance around my tank. No problems at all with heat . I got under the truck for a long time after I built the stacks and checked the tank after every run . It doesnt get hot enough to even transfer the heat to the tank after a hard run.
So far no BOOM!
Scott

GIT-R-DONE

Ok, a 4" pipe up thru the tonneau cover. After I centered it , and marked it, we pulled the cover off and cut a 5" hole and then sewed it ( the better half did that ). The hole at 5" gives you 1/2 inch clearance from the pipe. Also, one thing I figured we would have to do is cut a slit in the back and put velcro on it so we had enough clearance to lift the cover. THIS IS NOT NEEDED. Dont waste your time doing it.

As far as heat goes or melting.........no trouble at all. I know the exhaust gets hot but, it has done absolutely no damage, so I dont think that is an issue.

98 2500

how are you guys attaching the 4" pipe coming off the y to the stacks.