My internal exhaust flappers are gone what are the best flaps to replace them with?

Do you have straight cut tips? If so, you can get external flappers from Hardin, I have both.

I do and I have external rubber flaps just wasnt sure if it was necessary to have internals too being that's how it was before the one internal blew out. And engines out now so I figured now's the time to put new ones in if I need to

I prefer the external flaps myself. Perhaps they’re not as sexy but they do seem to be more reliable. My internal flaps made too much noise for me and now just running the external rubber flaps.