GM gaskets are probably made by felpro, either way they dont suck. Intense MLS gaskets are very strong but DONT NOT USE THEM WITH 1.9 ROCKERS. They kinda rub the shit out of your push rods. I have 4 push rods to prove it. If you dont want to fork out the cash for the intense ones get GMs or Felpro. What are you replacing your head gaskets for, did u blow one?