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1980 Pontiac Firebird - Spark Plugs

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Autolite Iridium Ultra Spark Plug - AI5263

Part #:: AI5263
Line:: ATO

Limited Lifetime Warranty

Seat: Tapered

Thread Size: M14

Heat Range: 11

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NGK Iridium Plug Number LZTR4AIX-11 Spark Plug - 2313

Part #:: 2313
Line:: NGK

1 Year Limited Warranty

Seat: Tapered

Thread Size: M14-1.25

Heat Range: 4

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NGK Laser Platinum Plug Number PLZTR4A-13 Spark Plug - 4997

Part #:: 4997
Line:: NGK

1 Year Limited Warranty

Seat: Tapered

Thread Size: M14-1.25

Heat Range: 4

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NGK Platinum Plug Number LZTR4AGP Spark Plug - 5017

Part #:: 5017
Line:: NGK

1 Year Limited Warranty

Seat: Tapered

Thread Size: M14-1.25

Heat Range: 4

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Denso Copper Spark Plug - 5018

Part #:: 5018
Line:: DEN

1 Year Limited Warranty

Seat: Gasket

Thread Size: M14

Heat Range: 16

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NGK V-Power Plug Number ZFR5N Spark Plug - 3459

Part #:: 3459
Line:: NGK

1 Year Limited Warranty

Seat: Gasket

Thread Size: M14-1.25

Heat Range: 5

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NGK V-Power Plug Number LZTR4A-11 Spark Plug - 5306

Part #:: 5306
Line:: NGK

1 Year Limited Warranty

Seat: Tapered

Thread Size: M14-1.25

Heat Range: 4

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ACDelco Copper Spark Plug - 41-631

Part #:: 41-631
Line:: ACD

100,000 Mile Limited Warranty

Seat: Gasket

Thread Size: M14

Hex Size (mm): 16mm