Added sparkplug gap setting.
Fixed lookup table error.
Cross reference sparkplugs for your Harley Davidson across major sparkplug manufacturers. Simply select which Harley engine you have in the dropdown box, then select which sparkplug manufacturer you wish to use. The application then shows the part number for the correct sparkplug for use in your bike, and what gap to set them at.
Sparkplugs listed are for engines in stock configuration. Aftermarket heads, high compression ratios may require a different heat range plug than stock.
