See the intake gasket template on the head? As you can see, the intake port on this head isn't in the stock location. The port is raised approximately 0.610 inches. The idea behind raising the port is to gain a line of sight shot straight to the valve. The port is also more or less the same shape at the gasket flange as a stock 1.85-inch by 2.16-inch port. The folks from Cometic have a dedicated intake gasket for this head.