That kinda has me befuddled, bemused, bewildered?
I can understand your fustration...

I think there might be another muffler out there somewhere that you can use, perhaps w/ some modification...

I'll help you search...


Main thing is though...why would Horizon show that engine installation and NEVER MENTION or SHOW the muffler during that stage of assembly???
Woeful neglect on their part...
Maybe if you side mount it, you can get away with not having to cut away so much of the fuse.?
Shouldn't have to do that though!