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Performance Spark Plugs

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NGK Racing Spark Plug - 5820

Part #:: 5820
Line:: NGK

1 Year Limited Warranty

Metallurgy: Copper

Thread Size: M14-1.25

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Autolite Racing Hi-Performance Spark Plug - AR3910X

Part #:: AR3910X
Line:: ATO

1 Year Limited Warranty

Metallurgy: Copper

Heat Range: 15

Thread Reach (mm): 24mm

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NGK Racing Spark Plug - 4091

Part #:: 4091
Line:: NGK

1 Year Limited Warranty

Metallurgy: Copper

Thread Size: M14-1.25

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NGK Racing Spark Plug - 4554

Part #:: 4554
Line:: NGK

1 Year Limited Warranty

Metallurgy: Copper

Thread Size: M14-1.25

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NGK Iridium Plug Number LTR7IX-11 Spark Plug - 6510

Part #:: 6510
Line:: NGK

1 Year Limited Warranty

Metallurgy: Iridium

Service Number: LTR7IX-11

Center Electrode Tip Material: Iridium