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This Cometic AFM fiber intake manifold gasket set fits Chevrolet 348/409 W‑Series Big Block V8 engines and uses a nitrile-synthetic rubber bonded to an aluminum core. Rated over 250°F, the AFM material offers about 85% recovery and strong torque retention so gasket sealers and re-torqueing are not required. It provides reliable sealability across varied flange conditions and meets OEM-quality expectations.
Cometic Chevrolet 348/409 W-Series Big Block V8 .059 Fiber Intake Manifold Gasket Set
