...what does it look like under there? Are there unfinished surfaces? Any surprises, or is it as simple as removing the mounting bolts and dropping it down? I looked at mine and it looks way to easy. I don't want to get into a project to then have it mushroom into something unexpected. What feeds the exhaust into the box?

Any insight is much appreciated.

Should be a finished product.The boat was built and the they added the platform on.My was off when I purchased it and had a custom one made by extreme marine.Good job they do.Hope this helps.

Very easy,only a few bolts.You can do it alone but a buddy comes in very handy. Most folks just put the bolts back in the holes. Don't forget to put clamp on rubber flappers on the tips.

When I pulled mine off the sealant used between the box and the transom pulled a little gelcoat off with it. It was no big deal but I did have to re spray the transom. The gelcoat behind the box was also very discolored.

Interesting. That's the kind of info I'm looking for...........the unexpected.

Thanks for all replies.

I don't think you'll have that problem. The Silent Thunder on a 311 is very different from a 303. The top half of yours is all part of the hull so you are really just dropping the bottom. The whole thing comes off with our 311's.

A girl at my marina dropped the bottom of her Silent Thunder on a 336. No problems, she has 502's, very loud.

That's right. Good point.

Everyone should realize there is a big difference between the older boats and the new boats regarding Silent Thunder.Just be sure which model you are asking about when you post a question,cause the answer can be very different.I responded to a 303 owner,my answer would be different to an older boat,just an FYI.

I didn't have any issues removing mine, but its not that old, only a '98.

There were 4 (I think) bolts holding it to the swim platform and two to the transom.

They had a sealant around the actual exhaust ports, so I had to wiggle and pull on it a bit, which had me nervous, but it finally came off.

I cleaned up the excess, put on some rubber flaps and away I went.

That coupled with the Stainless Marine exhaust really opened up the rumble.

how much do those extreme marine platforms run new?