Have any of you guys with 5" exhaust ever used these?

http://www.imcomarine.com/cal_store/...-mufflers.html

Sorry; not trying to change your topic.

As long as you have the large diameter versions and are not over 750HP or so, they should continue to work quite well for you.

Run these on my 30' scarab. They do make a huge difference at idle yet no noticeable difference at WOT. I did a little test on one engine when I was running it on the stand. With my DB meter I got 108db at an idle with no mufflers and 84db with mufflers. These numbers were taken from the same location that the videos below we're shot from. See the tests below. These are dry pipes with a little bit of water allowed into the pipe


http://www.youtube.com/watch?v=Xy-7U...e_gdata_player

http://www.youtube.com/watch?v=ZX0sV...e_gdata_player

this is a old post.. But you say, there is a rubber seal inside? have that all Muffler from cmi?
I have two pair of the elimination muffler for the 4" clamp on, and 5" outside diameter.. i donīt see any rubber..?

Have you a picture of the seal?

thanks

You will never get a response from him. He is gone from OSO and owed a lot of people a LOT of money.

For what it's worth, mine didn't have any rubber in them.