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Damn, I don't see any number even close to what Aredub posted earlier on the box, and I don't have my invoice with me right now. This is the only info I have:
PFR6B-11 <---- Old platinum stock spark plug
BKR7E-11 <---- New non-platinum plug, one heat range colder
^^ PF = Platinum
^ 7 is one heat range colder than 6.
That's what I remember, from what my tech told me.
And if I had to guess at what you were up to, I'd say nitrous.... I don't remember turbos needing non-platinums.
Whatever it's for, good luck. If you need more info, I'll see what I can find.
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