2 NGK Iridium Spark Plugs for Harley Davidson Twin Cam Models 99-16 HD plug 6R12

Description

Replacement NGK Iridium Spark plugs for Harley Davidson Twin Cam 1999- Present // Sportster 1986 - Present
NGK'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 set of (2).
Note: NGK plugs are no longer 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.
Fitment:
Twin Cam 88/96/103
1999-present
XL Sportster 883/1200
1986-present