Seller notes

Fits all 99-17 Twin Cam & 86-21 Sportster (except 2021 Sportster S/RH1250S) Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior insulation Multi-rib design of the insulator eliminates flashover Nickel-plated housing prevents oxidation and corrosion Multi-layer gaskets and heat crimping process ensure a leak-free, gas-tight seal Copper core electrode prevents oxidation and corrosion, has good electrical and heat conductivity and creates long spark plug ser...

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