NGK, spark plug Iridium IX BPR6EIX-11 1 step cooler: 84-99 Evo Big Twin models 75-E82 FL Shovel 75-E78 FX Shovel (NU) Standard:

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 IXr ideal for the performance enthusiast even better than platinum. Iridiums extremely high melting point is perfectly suited to todays 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. 1 step cooler: 84-99 Evo Big Twin models 75-E82 FL Shovel 75-E78 FX Shovel (NU) Standard: 83-85 XR1000 (NU)