I don't think I put rubber flappers on my exhaust as the plattform still would not allow a wave to crash up againts the exhaust outlets, but if you back the boat in slowly you may get some water in the tail pipes, so it wouldn't hurt to add the flappers. Also, if you look into the chambers from your rectangular rubber flappers on the silent thunder, you will see a vertical plate glassed into the interior of the chamber. I used a wood bit and drilled out that plate to let more exhaust out of the chambers. Also, if you end up cutting holes in the bottom, you could always add a plastic inspection plate and either let the puppies breath or screw in the inspection plate and quiet things down if you need to.

there are just regular tips inside mine. i dont think flappers are needed.

Thanks..was just worried about water ingestion and hydro-locking the ol girls up..I was thinking the same thing about cutting the holes the size of inspection covers so I had the option to quiet it down..but in my opinion..the louder the better!

If you have kids or go swimming a lot the silent thunder platform is MUCH better then a tube one.

+1! had one of my daughters leg that went thru the tube. She got stuck so bad, even with soap and solar cream it would not work!!! had to cut the tubes in place ! problem was to find the saw... on the water.

That is a very good reason to keep my ST platform and also why I got rid of step bars on my dually.

"You can always go bigger withe the "hoes""

Cracks may be due to captain allowing too big of hoes on da boat and not his docking skills...

Like he said a bad captain...

Lose it...i did.....long time ago.....rattle trap....

Yeah....the boat looks longer with it, but I hated mine enough to ditch it....after I tried the cutout method....