Thanks for your response. The reason why I'm asking is because The cheapest mufflers that come from Gaffrig Marine are a straight pipe (no bulges or bell shapes) muffler that has holes drilled in the bottom with a butterfly valve that opens by an electrical air operated switch. They resemble the Shotguns and have the same exact design only the Gaffrigs are a bit longer and have the little air cylinders that open the butterfly valves via a tiny air compressor. I asked Gaffrig about the sound levels it makes when the muffler valve is wide open and they said; "even with the valve all the way open the muffler itself still quiets the exhaust sound by 7db just by being on the end of the tailpipe." -----which is NOT the answer that I was looking for. Therefore I was hoping that the Shotguns weren't like the Gaffrig's units I have mentioned above. It may seem to be sounding a bit excentric about this but it is what I want. I will need to put a call into Drew Marine and find out still.Originally posted by 32storm
Kaama, in full open position, the shot-gun tips are not any quieter.