Replacement Parts

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Your Mercury Cougar is designed for speed and style, and it's important to make sure that your spark plug is the right match for your performance engine. Manufacturers often recommend spark plugs for Mercury Cougar to run cold to counteract the heat produced by your engine. When it's time to swap out those worn-out components, AutoZone provides the perfect solution.

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  • Part Number: XP25
  • Application: With 351 Cleveland engine (8 valve cover bolts)
  • Notes:
  • Part Number: XP104
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  • Part Number: XP24
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  • Part Number: XP105
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  • Part Number: XP26
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  • Part Number: XP5144
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  • Part Number: XP106
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  • Part Number: XP5145
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  • Part Number: XP5364
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  • Part Number: 9616
  • Notes: Gap is pre-set. Do not gap.
  • Part Number: 9659
  • Notes: Gap is pre-set. Do not gap.
  • Part Number: 9657
  • Notes: Gap is pre-set. Do not gap.
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You expect your Cougar to look good and perform well, which is why it's important to pay attention to what goes inside your car. Cougar performance spark plugs are manufactured to Mercury's temperature standards and they also resist fuel additive build-up. To learn more about why these plugs are so important, visit a nearby AutoZone and speak with our knowledgeable staff. Enjoy free diagnostic engine testing and battery charging during your visit as well, and benefit from our handy Loan-a-Tool program if you want to do the installation yourself.

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