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Champion, Copper Plus spark plug. RL82YC. 10-pk

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 (NU); Ducati: 95-97 400 MONSTER; 600 Pantah SL; Indiana 650; GT 860; GTS 860.

Fits: >

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