Cometic AMC Gen-3 V8 .064in ArmorCore Exhaust Manifold Gasket Set - With Rectangular PortsAFM is a chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core with temperature resistance of over 250F. AFM material has an 85 percent recovery while maintaining strong torque retention. AFM does not require gasket sealers or re torque. This Part Fits: Year Make Model Submodel 1971 1974 American Motors Ambassador Brougham 1971 American Motors Ambassador DPL 1971 1972 American Motors Ambassador SST 1971 1974 American Motors