The Champion Copper Plus 587 H8C Spark Plugs are designed for use in Harley Davidson motorcycles from 1972-78 Sportster models. These spark plugs have a 14mm thread diameter, standard configuration, and are made of copper material. Compatible with gasoline fuel type, these Champion spark plugs are manufactured by Champion, ensuring high quality and performance for your vehicle. With the OE/OEM part number 587 H8C and manufacturer part number 32-7544, these spark plugs provide reliable ignition for your motorcycle. This is for 2 Spark Plugs.