Compatible with 1972-1983 AMC 304 V8, 164-tooth, 31.5 lb, external balance.; Hays Steel Flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing. Meets SFI specification 1.1 for racing Hays billet steel flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing.;.
