I have a 89 272 sr1 with twin 454s with bravos. I need some help tho. Does anyone know where I can find the exhaust flaps that belong where the tail pipes connect into the silent thunder platform between the hull and platform. They appear to be 4in round flappers. Anyone ever replace having trouble finding them. Help would be appreciated thanks guys.

you mean the internal flapper?

Internal

Try cpperformance.com if this is what your looking for.

Corsa makes these below. There is also a link to ones that are made by stainless marine.





4? Internal Stainless Super Flap - 03-4030003-00