SP542 Thread

[WMassRaptor]

NGK 6510 seems to be the closest equivalent.
See the specs located on the ST forum about 1/2 way down the page, https://www.focusst.org/threads/another-1-step-colder-plug-option.156577/

 

[TheInfamousDrew]

cant seem to find any

This is where I ordered mine from and they were here in a couple days.


https://www.americantrucks.com/ford...-1117-35l-ecoboost-f150-ford.html#productInfo


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[smgilles]

cant seem to find any

https://www.cjponyparts.com/ford-performance-cold-spark-plug-set-3-5l-f-150-2010-2017/p/M1240535T/

 

[Gsteve]

thanks !!

 

[zemuron99]

showing out of stock today...

 

[verticallyblessed]

NGK 6510's are an iridium fine wire plug in heat range 7. OEM NGK is heat range 6. NGK's get colder the higher the number, so 7 is one step colder. Plenty of part houses keep them on the shelf. I am going to get a set of 6 today, gap at .028 and see how it does. I am getting a misfire on #6 with 83k on the odo and a 93PRX tune.