Spark Plugs

325 products

Spark Plugs for Harley-Davidson motorcycles are essential components that keep your Twin Cam, Sportster or Evolution engine running at peak performance. As an Iron City authorised Harley-Davidson dealer, we stock genuine and aftermarket spark plugs from NGK, Champion and OEM suppliers who understand the demands of Harley-Davidson powerplants. These quality components are designed to deliver reliable ignition and optimal combustion across a wide range of model years, from classic Shovelheads to modern M8 engines. Whether you ride a daily commuter or a weekend cruiser, using the right spark plugs ensures consistent starting, smooth running and proper fuel efficiency. Browse the full range below.