Harley Spark Plugs

Three way spark plug wrench fits all 10mm, 12mm, and 14mm plugs. Ideal for most motorcycles and ATVs.Spark plugs not included.

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...

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...

NGK's Standard Plugs are Constructed for Longer Life and Optimum Performance. 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 plug sold each. Fitment: Twin Cam 88/96/103  1999-present XL Sportster 883/1200  1986-present  ...

Autolite 4164 Spark Plug. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Very popular replacement plug among Harley riders for many years. For use on Twin Cam and Sportster models. Autolite® Copper Core plugs are your industry standard. Replaces HD 6R12, Harley 32317-86A Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof) Multi-rib insulator reduces danger of...

NGK spark plug for EVO 1340 and Shovelheads. NGK's Standard Plugs are Constructed for Longer Life and Optimum Performance. 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 each. Fits Big Twin Evo 1340 and Shovelhead, replaces HD 5R6A, Harley 33311-83....

Champion Copper Plus® spark plugs are a great choice for your Harley Twin Cam or Sportster and are the OE-replacement for the stock 6R12 factory plug.  The Champion copper plus spark plug features a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics Provides longer life; Copper core center electrode allows for accurate control of the plug's heat range, optimizing the plug's performance and adding to the longevity...

Champion Copper Plus® spark plugs are a great choice for your Harley Evolution 1340 or late model Shovelhead and are the OE-replacement for the stock 5R6A factory plug.  The Champion copper plus spark plug features a copper core electrode that provides increased conductivity and heat control while delivering good overall wear characteristics Provides longer life; Copper core center electrode allows for accurate control of the plug's heat range, optimizing the plug's performance and...

The Autolite Xtreme Sport® Spark Plug features a platinum finewire tip that helps with easy starting, reduces fouling of the spark plug, and ensures longer performance.Designed with iridium-enhanced 0.6mm finewire for improved ignitability, faster fuel combustion and a more focused ignition versus standard plugs. They also provide up to 26 percent quicker starts compared to that of standard plugs and as much as 21 percent less hydrocarbon emissions than standard plugs, which promotes better...

Autolite® 4265 Copper Core Spark Plug. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration for your Evo Big Twin or Shovelhead. Out of stock - Suggested: NGK 7634 or Champion RN12YC 5R6A Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof) Multi-rib insulator reduces danger of "flash-over" One-piece terminal post adds strength Resistor reduces radio frequency...

Ideal spark plug for Harley Ironhead 1000cc. NGK's Standard Plugs are Constructed for Longer Life and Optimum Performance. 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 each. ...

NGK's Standard Plugs are Constructed for Longer Life and Optimum Performance. 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 each. ...

NGK's IX Iridium Series Plugs were Designed Specifically for the Performance Enthusiast. Ideal plug for Harley V-Rod and Buell models (see fitment below). 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...

Buell Blast Spark PlugsNGK's IX Iridium Series Plugs were Designed Specifically for the Performance Enthusiast. The ideal plug for the Buell Blast 2001-2010. 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...