Valve cover gaskets..cork or rubber?

Felpro #1645.... 5/16" valve cover gasket (Cork-Lam Cork-Rubber w/ steel core) this is a great gasket....i just call my local parts store and give them this # and manufacturer... felpro #1645 and if they dont have it in stock usually they can order it and get it in the next day....autozone or advance auto parts should be able to get these for you.
 
Felpro #1645.... 5/16" valve cover gasket (Cork-Lam Cork-Rubber w/ steel core) this is a great gasket....i just call my local parts store and give them this # and manufacturer... felpro #1645 and if they dont have it in stock usually they can order it and get it in the next day....autozone or advance auto parts should be able to get these for you.

So these seal pretty good huh?
I guess the steel core help to stop over-torqueing?
I may have to give them a shot.

Thanks :nice:

Anyone else?