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  1. Tune-up time : spark plugs

    The real question for late build 21's and up who want to put in a colder plug or ngk plug are not able to because they dont make them indexed or with that little washer for some reason? So, is everyone just using the stock plugs when they replace them for these year f150's now?

  2. 21 spark plugs versus 22 spark plugs

    So i have an Oct 21 build date and have indexed plugs and was going to switch to a cold plug but they dont make them indexed?

  3. Better to replace spark plugs earlier than 100K if running a tune? Also, any better than OEM sparkplug options available?

    So did your truck have the indexed plugs or no? I dont understand why you cant buy cold plugs or ngk plugs that are indexed if thats what late 21 + need.




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