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GGB muffler inserts

Posted: Mon Jan 30, 2017 5:39 pm
by Seanik
The 318's on my 1988 28" M express seem to be getting louder under the hardtop. I thought about replacing the veritone mufflers but looks way to difficult to access them, probably lifting the deck to do the job right. I found these as an alternative, GGB Inserts, they are attached SS rings that are inserted into the transom exhaust tube, not supposed to create back pressure or lower efficiency. I called the manufacturer in Canada to get size recommendations and after a long phone conversation I am quite confident they will work and ordered a set. I will report on the inserts after the spring launch. Anyone with experience on these inserts or comments welcomed.

1988 28" Express
Twin 318's 240 hp
Erie Pa
Proud U.S. Army Vet

Re: GGB muffler inserts

Posted: Mon Jan 30, 2017 8:01 pm
by honestcharlie56
awesome, please let us know how you like them!!

Re: GGB muffler inserts

Posted: Sat Mar 11, 2017 12:44 pm
by tundrarules
Did you get them installed? When you do take a video so we can see how they sound. I may be pulling my mufflers soon. Real interested.... :mrgreen:

Re: GGB muffler inserts

Posted: Wed Aug 08, 2018 8:52 pm
by Aquaholic
Bringing this older thread back up. Our 1973 single express is WAY louder than our 32 twin sedan. I’d like to quiet down ‘Easy Does It’ so that I can hear my wonderful wife and others aboard when cruising at 12-15mph. Anyone have input on these devices that were talked about? Do they work? Or, are there recommendations for replacement mufflers that would be quieter?