AIR FLOW RESEARCH 6911 - SBF Intake Gasket Set 2.120 x 1.2. Intake Manifold Gasket - 0.06 in Thick - 1.82 x 2.54 in Rectangular Port - Composite - Magnum Series Heads - Big Block Chevy - Pair. AIR FLOW RESEARCH 6893 - BBF Intake Gasket Set For Bullitt Series Heads.