Does anyone have any first-hand experience with mufflers they can share? Looking to ditch my Corsa silent choice and go with something simple at the transom. Either clamp on or thru-bolt. Thanks.

I had these imco's on my boat, they actually turned the diesel drone into more of a growl and sounded better but still louder than I wanted so I tried the Gibson clamp ons which are slightly more restrictive but quieter. The diesels just don't have a good sound so I quiet is good but with a V-8 it is still nice to hear them a little. I have the IMCO's in the swap shop if you are interested.

http://www.offshoreonly.com/forums/s...p-muffler.html

I saw your post and unfortunately, those are waaay too long for my application. I need something 12" or less.

Thanks for the reply.

What about the teague switchable like the ones on the 500efi. St-450 I believe. I have them on my boat and love them

These are what I have now they should work for you.

Gibson Performance

I bought GGB inserts
4" - GGB Exhaust Technologies
Clean (reversable) installation. Can't comment on the sound yet though (a few more weeks before splash)..

I have two Gibson 4" thru transom mufflers brand new never used I will sell to you for $250.00 shipped in the US.
They are somewhere around $350 new, I bought them and they would not fit my boat because of the intergrated swim platform. I could have modified them but opted for another route.
New still in the box with all paperwork, and they won't hang out the back of your boat.
Gibson part number 310004, can send you pics if interested.

Ron

I have Gibson clamp on and they work great, I haven't noticed any loss in performance and I'm running just shy of 700hp. The nice thing is that when I'm inland I run them and I can take them off on the big lake. I've had them several years now, they don't stay clean long though. They do keep me legal and I don't get too much static from the LEO's.

I checked those out and they're rated under 500hp. Unfortunately, I don't think they'll work for me.