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Performance Spark Plugs

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Autolite Racing Hi-Performance Spark Plug - AR103

Part #:: AR103
Line:: ATO

1 Year Limited Warranty

Seat: Tapered

Thread Size: M14

Heat Range: 10 To 320

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Autolite Racing Hi-Performance Spark Plug - AR3923

Part #:: AR3923
Line:: ATO

1 Year Limited Warranty

Seat: Gasket

Thread Size: M14

Heat Range: 10 To 320