Stack opinion
Stack opinion
Just started installing this stack tonight. I wanted to no what you guys thought? It is just temperary will i get 4 inch downpipe. And the torch hoses are just holding it up i still have to finis it in the morning....
Here is what i have done so far its now all the way welded on some part.. When i finish i post pics of it done. And its just temp. till i have 4" d.p the im doing dual 5" stack painted black



And the whole. It was a comcrete pumpers truck so the dirt is stuck im still working on getting it out.



And the whole. It was a comcrete pumpers truck so the dirt is stuck im still working on getting it out.
I wanted to run it like that, outside the frame, but didn't have enough bends. Then I got to thinking that with dual stacks, all the smoke might go out the pass. side stack. So I went straight up from the factory exhaust spot.
If your rig is very nice, this might not be how to do it. You have to cut some stuff. The pipe is going to go right where a support for the bed floor is. "A" in photo. Also, you are gonna have to make big notch on the fuel tank crossmember, "B", that can be reinforcenced after. I haven't got to that part yet.

If your rig is very nice, this might not be how to do it. You have to cut some stuff. The pipe is going to go right where a support for the bed floor is. "A" in photo. Also, you are gonna have to make big notch on the fuel tank crossmember, "B", that can be reinforcenced after. I haven't got to that part yet.


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Thats exactly how I did it on my old plow truck I sold. I put the smaller pipe up through the bed and slid it up a couple of feet inside the 5 inch stack. That allowed the stack to get some fresh air in it also and you could put your hands on the bottom foot of the stack at all times. No fires in the bed with stuff flying around. I was afraid of leaves and stuff burning up the truck.
I am in the process of putting a stack on mine as well,Ive got the hole cut ,I just need to pick up some stuff from fleet supply tommorow.I was wondering about whether to run the pipe under the frame or between the frame and body.





lol there is prob. two quarter sized dents on the whole thing