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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    ZQ8/ZQ9 Factory-verified

    Chevrolet · Regular Production Option

    Optional Rear Axle Ratios (performance/economy)

    Years 1973 Models 1 Factory citations 1

    Documented applications

    Corvette (C3)
    • 1973 Factory-verified

      $12.00; 1,791 built. The ZQ8/ZQ9 code labels were previously CAC-only; factory kit price schedule (p.24) confirms both RPO ZQ8 and ZQ9

      GM Heritage factory kit — 1973 Chevrolet Corvette, p.24.

    Related codes · mentioned in these notes

    791ZQ8ZQ9

    This page aggregates every documented appearance of ZQ8/ZQ9 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.