Champion, Copper Plus spark plug. RL82YC. 4-pk 79-85 XL (NU) Ducati: 95-97 400 MONSTER 600 Pantah SL Indiana 650 GT 860 GTS 860.

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 UltrasealT 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. 79-85 XL (NU) Ducati: 95-97 400 MONSTER 600 Pantah SL Indiana 650 GT 860 GTS 860.