This gasket is designed for big-block chevy aluminum heads 809-12363390, 809-12363392 and 809-12363399. Use with manifold 809-12363406, 809-12363407, 809-12363420, 809-12363421.
GM Performance Parts Intake Manifold Gasket for the GM engines. This is the same high quality gasket that comes as original equipment on most GM Performance Engines.