internal exhaust flaps

[on_plane]

Does anyone know of a exhaust flap kit for mounting inside of a cast exhaust tip? The hard part is finding one that is 2 3/4" OD (the ID of the tip). If anyone knows of a source for these or if there are any thoughts about mdifiying a more common 4" set please let me know. I would like to take off the external flaps on my boat and need to kep the water out as my exhaust tips are only 2" above the waterline. Thanks.
:confused:

[Kikwear]

My complete Corsa setup had tips with internal flappers and external too. You could just use the internals I guess. I believe I have 4” tips, but you should call Corsa to see if they have different sizes. I don’t know why they wouldn’t.

[on_plane]

I was looking at sites like Eddie Marine and Imco. I'll give Corsa a call as that is a good idea. Thanks.