Spark Plug Replacement

Discussion in 'SN95 4.6L Mustang Tech' started by StangVertGT, Apr 26, 2013.


  1. StangVertGT

    StangVertGT Member

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    I have a 2002 Mustang GT 4.6L and I use it as a daily driver. I'm replacing the spark plugs and would like to know what kind to buy.

    Thanks for your help!
    #1
  2. trinity_gt

    trinity_gt Advanced Member

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    Go to the Ford dealership parts counter. Best plugs for a stock engine.
    #2
  3. StangVertGT

    StangVertGT Member

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    Thanks but that's what I was trying to avoid doing, that's why I asked on here.
    #3
  4. trinity_gt

    trinity_gt Advanced Member

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    Why?
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  5. StangVertGT

    StangVertGT Member

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    Because they always want stock, I want performance and quality.
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  6. trinity_gt

    trinity_gt Advanced Member

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    You'll get the most performance and quality out of OEM parts. If you were boosted or spraying nitrous I'd recommend an NGK TR6 (one range cooler than stock) but for a normally-aspirated engine you'd be risking fouling with a cooler plug.

    What quality shortcomings are you thinking of with OE stuff?

    How much of a performance gain do you expect with non-OE plugs and by what mechanism?
    #6
  7. StangVertGT

    StangVertGT Member

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    I just assumed aftermarket was better quality than oem that's all. Guess I was wrong. I ordered the motocraft SP493 on eBay. I was told that's oem and best option. Why does American Muscle promote NGK so much then and not motocraft?
    #7
  8. Nightfire

    Nightfire Mustang Master

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    You don't get ANY performance out of any of the different spark plugs, they mean NOTHING. Spark plugs are an after-thought, they mean absolutely nothing. Get whatever is cheaper. I got OE Motorcraft plugs off American Muscle for cheap. Don't be a ricer and thing plugs are important.
    #8
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  9. StangVertGT

    StangVertGT Member

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    No, No, I'm not. It states on American Muscle under NGK it says performance. That's why I thought it did. So obviously I want the best for my car at a price I can afford. So if there's better performance ones, then I wanted them. You know?
    #9
  10. Team Ford

    Team Ford Member

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    Heres a link to the Motorcraft Standard service plug.

    SP-493
    #10
  11. StangVertGT

    StangVertGT Member

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    Thanks. Already ordered those from eBay for $24 for 8
    #11
  12. flstang65

    flstang65 Well-Known Member

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    OE Motorcraft or Autolite ONLY
    #12
  13. JJ Glo

    JJ Glo New Member

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    I replaced mine today with motorcraft sp-493s from Autozone. Even though they're OEM, check the gap. About 5 of them had about a .58-.59 gap. I set them to about. 54-55
    #13
  14. fordx316

    fordx316 Member

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    As far as performance gains.... plugs dont do anything, cold air intake doesn't do anything, stickers and decals don't do anything (unless they're OEM SVT cobra emblems, those add a few horses) If you want to go faster buy some heads cams & intake
    #14
  15. fordx316

    fordx316 Member

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    as far as maintenance OEM > AFTERMARKET EVERY SINGLE TIME
    #15
  16. Mustang5L5

    Mustang5L5 Car used in adult film "Highway Gangbang-InDaButt" SN Certified Technician Founding Member

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    Don't fall for the marketing hype. The OEM plugs are the best choice here for plugs and a lot of other items
    #16

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