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  1. davekro
    Thread

    Denso vs. NGK 4912 Spark Plugs? Are Amazon or Rock Auto problematic for 'fakes'?

    I was wondering if it was worth it to consider using an equivalent spec'd NGK 4912 (ILKAR7B11) vs. the OEM choice of Denso SC16HR11(Toyota p/n...
    Thread by: davekro, Feb 4, 2026, 11 replies, in forum: Gen 3 Prius Technical Discussion
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