Autolite AP403 Platinum Spark Plug

Platinum tipped center electrode delivers precision firing, reduced gap erosion, increased durability, and improved fuel efficiency over the life of the plug. Copper core improves resistance to fouling.

• Shell
• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat TypeGasket
• Reach19mm (3/4")
• Hex Size13/16" (21mm)
• Terminal TypeRemovable Nut
• Gap.035" (0.9mm)

• Center Electrode
• MaterialPlatinum
• TypeNecked Down
• ProjectionNon-Projected

• Ground Electrode
• MaterialNickel
• TypeStandard
• Quantity1

• Specifications
• ResistorYes
• Resistor Value5k Ohm
• Heat Range7
• Torque SpecsCast Iron: 26-29 lb. ft. Aluminum: 15-22 lb. ft.

• Part Information
• BrandAutolite
• Warranty4 Years
• Longevity50k Miles

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