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1999 Cadillac Seville - Spark Plugs

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Autolite Iridium XP Spark Plug - XP104

Part #:: XP104
Line:: ATO

Limited Lifetime Warranty

Metallurgy: Iridium/Platinum

Center Electrode Tip Material: Iridium

Ground Electrode Tip Material: Platinum

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Denso Iridium TT Spark Plug - 4713

Part #:: 4713
Line:: DEN

1 Year Limited Warranty

Metallurgy: Iridium/Platinum

Center Electrode Tip Material: Iridium

Heat Range: 16

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NGK Iridium/Platinum Plug Number ITR5H13 Spark Plug - 97287

Part #:: 97287
Line:: NGK

1 Year Limited Warranty

Metallurgy: Iridium/Platinum

Service Number: ITR5H13

Center Electrode Tip Material: Iridium

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Champion Iridium Plug Number RS12WYPB4 Spark Plug - 9204

Part #:: 9204
Line:: CHP

2 Year LIMITED WARRANTY

Metallurgy: Iridium/Platinum

Service Number: RS12WYPB4

Center Electrode Tip Material: Iridium