Well gang, I just went to the IMCO website and I sure didn't see any of these tailpipe rings. I looked both in the Performance Hardware section and the Exhaust Systems and parts section and could NOT find anything within these two sections. They did show something simular to it but it looks as if you have to buy the exhaust tip with it if I am not mistaken.

Here's a link to Gil marine with pictures and specs.

http://www.gilmarine.com/products/transom/index.html

I got the part numbers above from a IMCO parts book that I have, I think is a year or two old.....maybe they don't have them anymore......Fred

CP PERFORMANCE has them. They are made by "Hardin marine".
Look under exhaust/ accesories.

I have 8 of them with rubber rings in my garage is your willing to re-poweder coat them. Drop me a line if interested.

-Greg