CHAMPION, COPPER PLUS SPARK PLUG. CCH388
RG6HCC. 10mm threaded. 4 used on M8, 2 used on XG. Used with a 16mm 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.

Fits: > 17-23 M8; 15-20 Street XG750/500; 17-20 XG750A