7/8-18 threaded

driving light or passing lamps to bikes equipped with 1-1/4" diameter engine guards / crash bars

Fits: > 65-06 B

All will fit all 84-up Big Twin and 86-up XL Sportster models

29956-70A and 29957-81B and 29957-85A

Spark Plug RA8HC (2) Vevparti & bottendel Sportster 7/8-18 threaded(6R12). 12mm threaded. 19mm (1 2") long reach. Used with a 18mm 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 32317 80 and 32362 04A. Fits: > 99 17 Twin Cam; 86 22 XL (excl. XR1200) SET OF 2