Autolite 51 Racing Spark Plug Each-Aut Ar51
Autolite 51 Racing Plugsspark Plug, Racing, 14 Mm Thread, 0.750 In Reach, Gasket Seat, Non-Resistor, Eachsmall 5/8 Hex With Same Heat Range Is Ar3933(Washer Style For Alum. Head, Usually For Alcohol Engine)
Internal Reference:
AUT AR51
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