I was just curious, Has anyone ever done a custom exhaust on their mud motor? Custom meaning they built the entire thing. I bet there are some crazy ideas, like a stack lol

Yep, loud as hell!!!! Went rite back to can muffler. It did rev quicker but seemed to lose a little low end. Im sure a H pipe or cross over would have helped that but was annoying loud.

I like that design. I bet it is loud lol. Reminds me back on my first truck, shortest glass pack on the shortest pipe . I still think to this day how did I go anywhere in that truck.

I always build my own. But I keep it simple and build it similar to the stocker.

What do you use for the muffler tube? Just a stock one and you design the rest? , or do you build the muffler tube itself too?

4" sch 10 316 SS

I bet it looks very slick and shinyyyy.

for the briggs I use to have

IMG_1196.JPG

IMG_2419.JPG

For the Kawi I have now

IMG_3880.JPG

So the pipe is completely hollow?

Yes, no baffles. Headers and outlet pipes are 1.5" 16 ga SS tubing. Can buy all the 1.5" straight or mandrel bent from Columbia River mandrel. The Main tube (4" sch 10) I got as scrap from my work. But you can buy all that online as well. Then you'll just need the exhaust flanges, or cut the ones off the stocker and reuse.

Very smart idea, I like it. Is it pretty loud?

Its not like stock, but its not too bad. Flows very well for my needs and my stage 2 Kawi

Gotcha, thanks for the help.

Here is my customer exhaust. Got the kit from Robertson's and had it welded up.

what in the actual fuck is that! ^

Dude!!

H finn

For stock motors and can be built for under $25.

Is that the BPS C?

Hey bud, I've never said one thing negative about that piece of trash that you feel the need to post on every exhaust thread...

how dare you insult bps like that

Will C-supposed to be "custom" exhaust. Auto complete got me on that one.
Brycecheramie- got the kit from Robertson's today tubes. Wanted long pipes without running the length of my motor.

I bet it runs pretty good. I like weird!

It runs much better than stock muffler. After jetting carb I picked up a few hundreds rpm up top and very noticeable amount of torque down low. I went from 98 main jets to 105's to get it dialed in.

I got idea here after reading about tuned exhaust. I always worried about burning exhaust valves with gutted stock muffler.

Don't know never tried it to find out. I've always heard running a 4 stroke without a manifold or with just a short header flange will burn exhaust valves.

Yep! It's no longer on there, that was a picture from last year. It came with a super trap type muffler and I didn't want it all hanging on the heads without support.

One I built for my Briggs, never to be repeated. Looked good but bad design!

1bravo-. It certainly looks sweet, but wouldn't it fill with water during storms?

Doubles as a rain gauge

I was just joking. I like it.