Digital Tuning Which Motorcraft Plugs For My '99 Gt?

Discussion in 'SN95 4.6L Mustang Tech' started by 99 FLA PONY GT, Aug 16, 2012.


  1. 99 FLA PONY GT

    99 FLA PONY GT Member

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    I have just turned 97,000+ miles and would like to do a tune-up @ 100K.
    I want to stick with Motorcraft plugs.
    What plugs came w/the car? Part#s?
    What's the difference between Platinum & Iridium and which performs better?
    Does Motorcraft make a Platinum and/or Iridium plug?
    If so please specify part#s.

    Thanks in advance.
    #1
  2. N8Dogg98

    N8Dogg98 Mustang Master

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    Stick with the factory motorcraft platinums. Some will say to get copper plugs d/t their hotter spark, but you'll never notice the difference. Iridium is an expensive plug and while they tend to last a long time and offer a good spark, again I don't think they're worth the money.

    Motorcraft platinum plugs should last 100K miles. AM sells them and if you send a PM to their StangNet rep you get a 6% forum discount.

    http://www.americanmuscle.com/ford-sparkplugs-9904gt.html
    #2
  3. Kilgore Trout

    Kilgore Trout Fried or Broiled ?

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    I suggest NGK TR6 if you are prepared to change them every year. Be sure you research changing them. On the surface its a simple job but there are a lot of details you need to get right. I have already posted them should be easy to find...
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  4. 99 FLA PONY GT

    99 FLA PONY GT Member

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  5. 99 FLA PONY GT

    99 FLA PONY GT Member

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    Thanks,
    Do you know what the Motorcraft part# is for their Platinum plugs?
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