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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Which plug should I go with Sp 550 or Sp578?
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<blockquote data-quote="K-Doob" data-source="post: 1768131" data-attributes="member: 21963"><p>SP542s are the best OEM plug, especially if running a tune. Unfortunately they can be difficult to find these days. Last set I had to piece together from local auto stores and ebay sellers.</p></blockquote><p></p>
[QUOTE="K-Doob, post: 1768131, member: 21963"] SP542s are the best OEM plug, especially if running a tune. Unfortunately they can be difficult to find these days. Last set I had to piece together from local auto stores and ebay sellers. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Which plug should I go with Sp 550 or Sp578?
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