When it's time for a tune-up, give your engine the clean, reliable spark it needs to run its best. This spark plug from Autolite is designed for consistent ignition performance in your Harley-Davidson.

• Improved Spark Performance: Engineered with a tapered nickel/chrome alloy tip and a copper center electrode to deliver a sharper, leaner spark for reliable combustion.
  
• Specific Harley-Davidson Fitment: Designed for use in Harley-Davidson Sportster and Twin Cam models.
  
• Manufacturer Part Number: This is Autolite spark plug part number 4164.
  Sold Individually: Please note that these spark plugs are sold individually.