This is a Victor Reinz Nitroseal composite head gasket. It’s the choice for many engine builders. It uses a perforated steel center and is rolled with 100 percent graphite facing to seal while allowing the head and engine block to react differently to heat. Each cylinder has a stainless steel fire ring that helps prevent damage to the graphite. Ali recommends this head gasket for his traditional V-8 pushrod and some import engine customers.