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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
FYI SP-542 successor is NOT the SP-578
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<blockquote data-quote="Metroplex" data-source="post: 1596245" data-attributes="member: 47234"><p>My factory SP542 plugs were stamped NGK ILTR7N8 with Ford branded ceramic. You can still get the NGK equivalent to SP542. In my mind the SP542 were just Ford branded NGKs. The SP578 are 1 heat range hotter. I haven't been able to find out why Ford did a widespread supersede of SP542 with SP578 other than the SP542 seems really easy to carbon foul because they are a cold plug but OE for the 2.7 EcoBoost.</p></blockquote><p></p>
[QUOTE="Metroplex, post: 1596245, member: 47234"] My factory SP542 plugs were stamped NGK ILTR7N8 with Ford branded ceramic. You can still get the NGK equivalent to SP542. In my mind the SP542 were just Ford branded NGKs. The SP578 are 1 heat range hotter. I haven't been able to find out why Ford did a widespread supersede of SP542 with SP578 other than the SP542 seems really easy to carbon foul because they are a cold plug but OE for the 2.7 EcoBoost. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
FYI SP-542 successor is NOT the SP-578
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