There is indeed an exhaust donut inside of my exhaust port. I am going to leave it in until I can get a new one in the correct size.

Has anyone used the exhaust donut in the following link in their 110? http://www.dratv.com/noname203.html

This one is listed as compatible with only the CT90's, but i'm wondering if there is even a difference in diameter of exhaust ports between the 90's and 110's. Unfortunately there are no measurements on the products.

Thanks guys!