When I bought my Hooker 2460's they came with a couple different gaskets. One set is the what is listed below.

http://store.prestoliteperformance.com/aluminum-exhaust-gasket-small-block-chevy.html

These are aluminum and kind of a layered construction. They are flat on one side and indented a little on the other. The indented side edges are jagged as well. I've looked online and held them up to the car and headers and I'm still confused.

Suggestions?