Repl. for OEM 6R7. 14mm threaded. 19mm (3/4") long reach. Used with a 21mm spark plug socket. 14mm threaded. Removable terminal. The NGK Iridium IX spark plugs offer improved throttle response, superior anti-fouling and high-ignitability, which makes Iridium IX® ideal for the performance enthusiast, even better than platinum. Iridium's extremely high melting point is perfectly suited to today's high-temperature engines, delivering outstanding acceleration, fuel efficiency and double to triple the lifespan of a copper core plug. - Fine iridium tip ensures high durability and a consistently stable spark. - Trivalent metal plating for superior anti-corrosion and anti-seizing properties. - Outstanding acceleration, high fuel efficiency and durability.
Fits: > 1 step cooler: 84-99 Evo Big Twin; 75-E82 FL Shovel; 75-E78 FX Shovel (NU) Standard: 83-85 XR1000 (NU)
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