Got a 27 Fountain Fever with a 500hp and it has Graffig bolt on air operated mufflers bolted to the exterior of the boat that dont baffle any sound. Well, my question is are there any mufflers that will actually quiet the boat for docking? With the huge stainless headers I'm not sure that you can put the select system down thru the drive plus I'm sure its a few grand. I keep seeing different types of mufflers on the web and wasnt sure whats worth a dime.

Thanks in advance for the help.
Mark