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These Autolite XP Xtreme Performance spark plugs feature an iridium-enhanced .6mm fine-wire center electrode design and patented platinum side wire technology. They will provide better overall durability and a more focused ignition to produce higher ignitability and improved performance. The Autolite XP Xtreme Performance spark plugs use a nickel plated shell and multi-rib insulator. Whether you have a high performance street car, race car, or daily driver, these Autolite XP Xtreme Performance spark plugs will give you the power and consistency that you have been looking for.
Manufacturer's Part Number: XS4164
Part Type: Spark Plugs
Product Line: Autolite XP Xtreme Performance Spark Plugs
Shorty Spark Plug: No
Manufacturer Heat Range: 4
Electrode Core Material: Copper
Electrode Tip Material: Nickel alloy
Insulator Type: Projected
Spark Plug Thread Size: 12mm
Spark Plug Reach: 0.750 in.
Spark Plug Seat Style: Gasket
Wrench Diameter: 11/16 in.
Ground Strap Quantity: One