thanks Troutly for the info - nice setup -- i think i will try those elbows -- when you first said they were rubber i couldn't believe they would take the heat because my rubber hoses burned out just before the elbows (but then i remembered my exhaust was dry to the tips -- a little bit hotter )

this setup of yours is definitely worth looking into -- i will try it next spring -- boat is out of water now - blew head gasket between #5 & #7 on my 575SCi - that incompressible water stuffed the top ring lands into the second ring - had to buy two new pistons (by the way - if you don't want to change all the pistons, you have to buy these "custom" ones from Mercury at $180 a POP - that sucked )

anyhow - i took a look at your photo album -- i see you have the ITS's -- you mentioned you could not use Silent Blunder with that setup -- my question is, would you have used it if you could have ?? if not - why not -- so i don't waste time looking into that idea any further

So where do you get these things.

Put S pipes in, underwater at idle, loud at on plane speeds.

By installing these rubber hoses and haveing them in the water at idle, What are the chances of reversion?

NEVER have even heard of reversion with the S pipes.

Check out Corsa.

Know someone with the Troutly Solution, and no problems, they used PVC pipe.

OK then --- I am going to give up on this Formula Silent Blunder idea i guess - if i get my motor back in the boat within the next couple weeks, i will go out and buy some of those Troutly Snufflers

then i will db the thing, with and without at idle -

plus db it at speed like the law states, with and without the snufflers

The enforcement boys here have only been testing for noise at idle, so this deal may be a cheap fix for us - at least for a while maybe -- thanks for all the inputs -- i will post the results

I'll sell you my silent choice for $500

The silent thunder is part of the swim platform. It does not bolt up under the swim platform. I would think that the cost of doing it nice would cost you more then something like Troutly has or the GGB's even.

Jon

Like Audio said, Silent Thunder IS the swim platform. The whole thing is hollow and fills with water from the bottom when you put the boat in the water. At idle the exhaust has to go thru this water to get out the tips. When on plane, the water goes out both the exhaust outlets and the filler holes in the bottom of the platform.

'Foul

I think newer ..... 93 + ...like on 312's does bolt under the swim platform ...But I think Audiofn is right ...I would go muffler route ....