MCS-932984 - Two steps cooler than OEM 6R12. 12mm threaded. 19mm (3/4") reach. Used with a 16mm spark plug socket. Removable terminal. Copper-core center electrode. NGK copper core V-Power spark plugs feature a specially designed v-groove center electrode; improving

Fitment:
2 steps cooler: 99-17 Twin Cam. 08-12 XR1200. 02-17 V-Rod. 1 step cooler: 89-92 Buell RS1200; 97-02 M2 Cyclone; 96-98 S1 White Lightning; 94-95 S2 Thunderbolt; 97-02 S3 Thunderbolt; 98-02 X1 Lightning.