Description
Spark Plugs – ’48-’74 Big Twin
Plugs have a unique look with their black ceramic body and bold red logo/script, Insulator is made of 95% pure alumina; features strong resistance to heat shock and superior insulation, Multi-rib design of insulator eliminates flashover, Nickel-plated housing prevents oxidation and corrosion, Multilayer gaskets and heat-crimping process ensure a leak-free, gas-tight fit, Copper core electrode prevents oxidation and corrosion and has good electrical and heat conductivity for long spark plug service life
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