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Spark Plugs

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Autolite Iridium Ultra Spark Plug - AI5325

Part #:: AI5325
Line:: ATO

Limited Lifetime Warranty

Seat: Gasket

Thread Size: M14

Heat Range: 10

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Bosch EVO Spark Plug - 8515

Part #:: 8515
Line:: BOS

7 Year Limited Warranty

Seat: Gasket

Thread Size: M12

Heat Range: 5

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Autolite Racing Hi-Performance Spark Plug - AR5324

Part #:: AR5324
Line:: ATO

1 Year Limited Warranty

Seat: Gasket

Thread Size: M14

Heat Range: 11 To 375