1962-1963 Chevrolet Corvair 2.4L H6. 1965 Chevrolet Corvair 2.7L H6. 1964 Chevrolet Corvair 2.7L H6. GENUINE NGK SPARK PLUGS . Plugs feature a fine-wire Iridium center electrode and Nickel-alloy ground electrodes for maximum engine horsepower and torque.