Best Dry Muffler
#1
Thread Starter
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Joined: Mar 2002
Posts: 224
Likes: 23
Hi All, Is anyone able to advise the best muffler than can run dry.
My motor is currently running dry to the tips exhaust with eickert headers.
However, too much cam overlap means I cannot run wet exhausts, but also need to quieten it down for marinas.
Any advice on the best muffler that would help me keep quiet in the marinas. please?
I was looking at GIL Select Sound and CMI After Firing Sound Choice as a couple of options. Are there other options, and what's "best" in terms of combining noise reduction while also not hurting performance.
Thanks

My motor is currently running dry to the tips exhaust with eickert headers.
However, too much cam overlap means I cannot run wet exhausts, but also need to quieten it down for marinas.
Any advice on the best muffler that would help me keep quiet in the marinas. please?
I was looking at GIL Select Sound and CMI After Firing Sound Choice as a couple of options. Are there other options, and what's "best" in terms of combining noise reduction while also not hurting performance.
Thanks

#4
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Joined: Nov 2004
Posts: 14,068
Likes: 3,667
From: On A Dirt Floor
Found this excerp from Smitty (articfriends)
When i started using my dyno i had giant semi or tractor mufflers, i found they still cost 15 to 20 hp though, it may have been exhaust reversion though where 6" tube slipped over 5" tube. I had a set of 5" 400$ gibson clampons laying around and stuck them on the 5" pipes, they cost about 3 hp at 550 hp, cost 7 to 10 at 700 hp. After 100 pulls they still look fine and there is nothing in thembto burn out, might be a viable, cheap option for you! How much hp we talking?
#6
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Joined: Feb 2002
Posts: 542
Likes: 29
From: Solomons Island, MD, Vero Beach and Punta Gorda, FL
I have two sest of Gibson Clamp on for sale if you want to try them. Great shape. 4" inlet, 4.5" outlet. Best offer and will ship for free.
Thanks.
Ed
Gibson Performance Exhaust 110003 - Gibson Bullet Stainless Superflow Marine Mufflers
Thanks.
Ed
#8
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Joined: Mar 2020
Posts: 833
Likes: 494
#9
I ran Gibson clamp ons, on my Eickert dry to tip set up on Innovation 600s. They didnt make the boat quiet, by any means, but did get rid of the very sharp crackle. No issues with burning, etc.. One of my favorite sounds EVER, was lighting them up, and the sound before the water even hit the tips! Neighbors and Wife, not so much
#10
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Joined: Oct 2010
Posts: 1,621
Likes: 402
From: Cheboygan, MI
I have the Gibson's as well and they take some of the bark out especially idling down the river. But when she gets in to the powerband it sounds awesome. I've run with and without and I can't tell the difference. I've noticed way more difference when I added a 4 hole tapered spacer under the carb. Their truck exhaust uses the same design and I have over 150k on my Gibson truck exhaust.



