NGK Parts & Accessories

NGK have been making spark plugs in Nagoya since 1936 and are original equipment on millions of motorcycles worldwide. Their Harley-Davidson range covers standard copper, Iridium IX, and Laser Iridium plugs, engineered to the specific heat ranges and electrode gaps that V-twin engines need.

Consistent quality and precise manufacturing tolerances — a fresh set of NGK plugs is one of the most cost-effective maintenance steps you can do on any Harley. Simple, reliable, and trusted everywhere.