CHAMPION, COPPER PLUS SPARK PLUG. RL82YC. (2)

H-D #4R. 14mm threaded. 12.7mm (1/2") short reach. Used with a 21mm spark plug socket. Copper-core center electrode with the patented SAC-9 semiconductor resistor. Spark plug comes with the patented Ultraseal™ coated shell, to help keep the spark plug body corrosion free and better looking for a longer period of time. Custom replacement for OEM 32301-80.

Fits: > 79-85 XL       SET OF 2