Help me build an exhaust

Mufflers weigh about 50 pounds by itself

 

If you plan to run flatbed in the future, Stacks will make you work more. Stacks, tarp, weed burner, no tarp.

 

Id run a single weed burner same size as the flexpipe. Probably 4" or so. Save you time money and weight.

 

I would not put a weed burner on a bicycle, as far as I am concerned they should be illegal.
That said,, I was in the same boat as you, and checked on installing side mount stacks, NO there is not room for 8 in exhaust, or even mufflers on them, and I priced all the hardware to put side stacks on it and it was spendy, but that is not the reason I didn't go with them. I was told by international, that some of the cabs did not have the inter support that supports the brackets for the stacks, and I did not want to tear out my interior just to see if it did or not. How true that is, I do not know.
My truck had a single stack, so I built an offset headache rack that left the exhaust exposed on the passenger side and had more clearance than the muffler itself.
I also had the full skirts, so I built hidden boxes that went behind them, one one the drivers side for straps that was only 6 inches or so wide, that would hold 16 straps, and one about 18 inches wide for the passenger side for misc. stuff. I also bought one of the aluminum boxes that went between the frame rails.

I did remove the roof fairing, and it drove like a whole different truck without it.

 

It handled much better in wind, curves and just in general, I am talking quite a bit.
I ran out west in the wind and mountains a lot, a guy might not notice it as much in some parts of the country, but it will still be noticeable, I am pretty sure. I know it was night and day difference in mine.
PLUS, it didn't look stupid pulling a flat or step, and I had no intentions of ever pulling a van again. lol

 

From what I was told, that is what they have already built in on cabs that are made for dual stacks.
I have straights on one of my cats, but only because I do not want that low clearance muffler under it that KW and International uses. The noise gets old, especially when I run the jakes for 3 or 4 miles. lol
I bought some inserts to put in them one time, but never did, I am now thinking about getting some of those slim chrome mufflers and installing them, but probably won't.

I would not pull the roof fairing off if I was pulling vans, the few times I have pulled a van, since I took it off, the mileage sucked big time compared to when I was pulling them every day and had it on.

 

On a 9600 they had dual on the side of some. Your gonna remove a catalyst muffler on a 07. However when you come up to installing your Y under the cab. The trucks from the factory used 4" for clearance between cab and frame. Then you could use 4" elbows and adapt to what ever size you want. Its gonna be a hodge podge of parts.


Visit a junk yard or someplace and take some pics.