Harley Davidson 71-85 Sportster 32366-04 4R5G SPARK PLUG
(4R5G)Fits '71-'85 Sportstermodels or use in place of Nos. 3, 4R and 4R5. A special thread and shell coating ensures quick and easy removal from aluminum heads and resists corrosion. A gold palladium insert extends life and improves resistance to corrosion. The 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. Plus, a copper-cored ground electrode runs cooler for extended life.
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