....1234, I wish you lived closer to me so I could have you visit my hanger where I could show you 6 or 8 different Cub engine and muffler installations. Posting photos on here is too much of a PITA so I won't do it! For me, the muffler you have there doesn't hit the center line of the tunnel close enough and it sits too low and a lot of muffler will be hanging out below the cowl plus the forward portion of the muffler will stick out of the lower front cowl area. Not hidden enough for me, but that's just me. You're going to have to "hack" up the cowl to get it on over that exhaust. We all have different criteria for what is ok on our models, so if you don't care about a clean hidden installation then it will work. I am picky on cutting a cowl the least amount possible on a scale type plane. On a non scale plane, then let the whole muffler hang out, it doesn't matter to me. That's just my personal little hang up! So having said that, I am now back to advising a 90* laid over with a pitts muffler installation. Do what works for you. BTY, that's a strange looking Super Tiger muffler, nothing like what a current one looks like. Is this an old (new old stock) early made in Italy Super Tiger?