I don't think it will be a problem, the inside of the pipes are hot it will burn it right up

Don't run the rubber flappers with dry exhaust, they will make a funny smell!

Ok, so I ran the boat on the hose last night and I have leaks at the slip joint between the tails and the header collectors.
I used what I thought was a lot of permatex high temp orange silicon on the slip joint, but apparently not enough.

What are are you guys using to seal the slip joint?