New Emgo shorty reverse cone exhaust on my 2014 CB1100

[dsinned_imp]

Fortunately, my local auto parts store has a good selection of these so-called muffler pipe adapters, so what would be on the "ideal" dimensions on both ends to eliminate the Emgo reducer(s)? Also, how long should it be from end to end, and do you think it possible to "polish" as a substitute for chrome? Admittedly, that would be a lot more work without a professional polishing tool. I think finding one with a slight "S" curve would be asking too much for such an off the shelf, inexpensive part that only costs 3 dollars.

Btw, I really like the black fenders and wind deflector on your bike!