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2005 Cadillac STS - Spark Plugs

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Autolite Iridium XP Spark Plug - XP605

Part #:: XP605
Line:: ATO

Limited Lifetime Warranty

Metallurgy: Iridium/Platinum

Center Electrode Tip Material: Iridium

Ground Electrode Tip Material: Platinum

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Bosch Fine Wire Double Iridium Spark Plug - 9617

Part #:: 9617
Line:: BOS

7 Year Limited Warranty

Metallurgy: Double Iridium

Center Electrode Tip Material: Iridium

Ground Electrode Tip Material: Iridium

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Autolite Double Platinum Spark Plug - APP605

Part #:: APP605
Line:: ATO

5 Year Limited Warranty

Metallurgy: Double Platinum

Center Electrode Tip Material: Platinum

Ground Electrode Tip Material: Platinum

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Autolite Platinum Spark Plug - AP605

Part #:: AP605
Line:: ATO

4 Year Limited Warranty

Metallurgy: Platinum

Center Electrode Tip Material: Platinum

Ground Electrode Tip Material: Nickel

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Autolite Copper Core Spark Plug - 605

Part #:: 605
Line:: ATO

2 Year LIMITED WARRANTY

Metallurgy: Copper

Center Electrode Tip Material: Nickel

Ground Electrode Tip Material: Nickel