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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    QBS Factory-verified

    Chevrolet · Regular Production Option

    White-letter SBR tires P255/60R15

    Years 1978–79 Models 1 Factory citations 2

    Documented applications

    Corvette (C3)
    • 1978 Factory-verified

      $216.32; 18,296 built (CorvSport shows 18,269 — apparent transposition; CAC and CorvetteStory agree on 18,296)

      GM Heritage factory kit — 1978 Chevrolet Corvette, p.22.
    • 1979 Factory-verified

      $226.20; 17,920 built (CAC lists size as P255/70R15 — P255/60R15 per the other two sources)

      GM Heritage factory kit — 1979 Chevrolet Corvette, p.7.

    This page aggregates every documented appearance of QBS in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.