CV Performance
Improving the Performance of your Harley Motorcycle

Autolite Spark Plug 4164

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Retail: $6.95 $4.95
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    Autolite 4164 Spark Plug. Guaranteed to deliver quick starts, good fuel economy and smooth acceleration. Very popular replacement plug among Harley riders for many years. For use on Twin Cam and Sportster models.

    Autolite® Copper Core plugs are your industry standard. Replaces HD 6R12, Harley 32317-86A

    • Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
    • Multi-rib insulator reduces danger of "flash-over"
    • One-piece terminal post adds strength
    • Resistor reduces radio frequency interference (RFI) and electrode erosion
    • Cold-formed steel shell precision rolled threads
    • Full copper core electrode provides better performance in all conditions

    Spark plugs sold each.


    Twin Cam 88/96/103 1999-present
    XL Sportster 883/1200 1986-present
    Note that appearance of all products are subject to change.