My friend just picked up a Hammer and it has 6 inch long external mufflers that he wants to take off the boat. Where can we get a set of regular thru hull adapters with the internal flappers to replace the mufflers with? We can re-use the rubber external flappers just need the parts to go thru the hull.

ask for bill he will set you up http://www.diamondperformanceparts.com/home.php?cat=283