WH - Fabricated Exhaust

[Phan 50]

Everyone has to see it and hear the sound !

 

[ri702bill 10,951]

A small glasspack straight-thru muffler would mellow it down a tad, like a stack does....

[Achto 30,434]

The longer pipe sure changes the sound. Saw one GT with the pipe run all the way out the back of the tractor. Had a really nice rap to it. Did not sound like a typical single cylinder small engine.

[Pullstart 68,603]

Very nice!

 

I’ve made a few, they are fun to tune the sound.  A bolt, a washer, a cut or convoluted washer, they all make a difference.  Have fun!

 

https://www.wheelhorseforum.com/topic/105214-the-big-exhaust-conundrum/?tab=comments#comment-1141251

 

I did finally build a real muffler.  It sounds great!

 

https://www.wheelhorseforum.com/topic/61099-picked-up-a-c-101-this-morning/?page=3&tab=comments#comment-1183207

 

Edited November 10, 2025 by Pullstart

[Lee1977 7,499]

Here one I made for an 18 HP Vanguard. There is nothing in the 2"" tail pipe or the 3/4 tubing up to it. Just the 1" washer with the two 3/4" washer spaced out with drilled out 1/4" nut spacers.

 

[Phan 50]

I'm wondering this one can be installed in WH 12 Auto. 

https://www.amazon.ca/gp/product/B09S5LD9Y8/ref=ox_sc_act_title_1?smid=AHSL5HR4HP3O4&psc=1

[Lee1977 7,499]

It doesn't give the diameter of the pipe.my guess is it's too small diameter for a 12 Kohler.

[953 nut 63,540]

As I recall it the mufflers on 2 cycle mini-bikes have some back pressure engineered into them, Not too sure that would work for you.