A special thread and shell coating ensures quick and easy removal from aluminum heads and resists corrosion.

• Gold palladium insert extends life and improves resistance to corrosion

• Tapered tip provides better spark exposure to air/fuel mixture and allows the mixture to flow more easily through gap area for maximum combustibility

• Fouling resistance is improved with smaller diameter center electrode wire and insulator tip

• Copper-cored ground electrode runs cooler for extended life

• Anti-seize coating on threads

• Each sold separately

• 10R12X