Replacement Ton's Performance Iridium Spark plug for Harley Davidson Milwaukee-Eight / XG 2015 - 2025

Ton's IX Iridium Series Plugs were Designed Specifically for the Performance Enthusiast.

• Fine Wire Center Electrode Ensures High Durability and a Consistently Stable Spark
• Iridium Alloy has an Extremely High Melting Point, Perfect for Today's High-Tech, High Performance Engines
• Trivalent Metal Plating Provides Superior Anti-Corrosion and Anti-Seizing Properties
• Corrugated Ribs Prevent Flashover
• Pure Alumina Silicate Ceramic Insulator, Provides Superior Strength and Better Heat Transfer
• Copper Core Aids in Heat Removal
• Triple Seals Prevent Leakage

Spark plugs sold as single plug.

Note: These plugs are not factory gapped. DO NOT GAP IRIDIUM PLUGS WITH A COIN OR DISC STYLE GAP TOOL. Attempting to gap Iridium plugs with any tool that contacts the center electrode will damage the electrode and void any warranty. Use a gap tool such as those combined with feeler gauges which has a fork or slotted prong that allows you to gently bend the 'L' shaped ground electrode to the proper gap. Most Harley models require a gap of .038 - .040 for electronic ignitions. Be sure to check your factory service manual.

• Thread diameter: 10mm
• Thread Pitch: 1.0mm
  
• Thread reach: 19mm
• Seat type: Gasket
• Hex size: 16mm / 5/8"
• Tip configuration: non-projected
• Construction: Standard construction
• Terminal type: Removable nut (M4 thread)

Fitment:

Cross references:

• Harley Davidson 31600012
• Brisk AR12YS
• Champion RG6HCC
  
• Denso U24EPR9
• NGK CR9EB
• NGK CR9EIX