Autolite XST4055 Xtreme Start Spark Plug

Iridium and platinum electrodes provide the durability of double platinum plugs with virtually no gap erosion, longer life, and top fuel efficiency over the life of the plug. Fine wire electrodes provide increased ignitability.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach19mm (3/4")
• Hex Size13/16" (21mm)
• Terminal TypeRemovable Nut
• Gap.024" (0.6mm)

• Center Electrode
• MaterialIridium-Platinum
• TypeFine Wire
• Size0.6mm
• ProjectionNon-Projected

• Ground Electrode
• MaterialPlatinum
• TypeStandard
• Quantity1

• Specifications
• ResistorNo
• Heat Range7
• Torque SpecsCast Iron: 26-29 lb. ft. Aluminum: 15-22 lb. ft.

• Part Information
• BrandAutolite
• LongevityUse Equipment Recommended Replacement Interval

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