Im building a dseries and im hearing about a y8 headgasket, and a 2 layer y8 headgasket. Which models did these two come on? And i kno i can just take apart the normal 3 layer by removing the lil brass pins that hold it together, so if i do that how do i get them out without damage and which layer is removed, im assuming either the top or bottom paper layer?

thanks alot