The Cometic fiber intake manifold gasket set for Chevrolet Mark‑IV Big Block V8 (.125 in) uses AFM construction—chemically blown nitrile synthetic rubber bonded to an aluminum core—for temperature and fluid resistance. AFM sustains strong torque retention, features high recovery, and removes the need for sealants or re-torque. The gasket delivers excellent sealability across different flange conditions and is manufactured to meet or exceed OEM quality standards.

Cometic Chevy Mark-IV Big Block V8 .125in Fiber Intake Mani Gasket Set