57-78 XL SPARK PLUGS PR
- Copper core electrode prevents oxidation and corrosion and has good electrical and heat conductivity for long spark plug service life
- 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
- Plugs have a unique look with their black ceramic body and bold red logo/script
2103-0206