CHAMPION, COPPER PLUS SPARK PLUG. RA8HC
 (6R12). 12mm threaded. 19mm (1/2") long reach. Used with a 18mm 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 32317-80 and 32362-04A.
 Fits: >99-17 Twin Cam; 86-20 XL (excl. XR1200)