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The Cometic fiber intake manifold gasket set for Chevrolet Mark‑IV Big Block V8 (.047 in) is specified for Brodix Big Duke PB 1800/1802 heads and uses AFM material: chemically blown nitrile rubber bonded to an aluminum core for heat and fluid resistance. AFM provides strong torque retention, about 85% recovery, and eliminates the need for gasket sealers or re-torque. The gasket offers excellent sealability across varied flange conditions and OEM-grade quality.
Cometic Chevy Mark-IV Big Block V8 .047in Fiber Intake Mani Gasket Set
