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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    J56 Factory-verified

    Chevrolet · Regular Production Option

    Special Heavy Duty Brakes

    Years 1963–79 Models 4 Factory citations 6

    Also described as HD front disc / rear metallic drum brakesSpecial Sintered Metallic (heavy-duty) Brake PackageSpecial Heavy-Duty Brakes (competition caliper package)Special Heavy-Duty Brakes (competition metallic caliper package)Heavy duty brakes

    Documented applications

    Camaro
    • 1967 Factory-verified

      Z28; requires J50

      GM Heritage factory kit — 1967 Chevrolet Camaro, p.75.
    Corvette (C1 / C2)
    • 1964 Factory-verified

      $629.50; 29 built; race-oriented brake package

      GM Heritage factory kit — 1964 Chevrolet Corvette, p.17.
    • 1966 Factory-verified

      $342.30; 382 built

      GM Heritage factory kit — 1966 Chevrolet Corvette, p.14.
    • 1967 Factory-verified

      $342.30; 267 built

      GM Heritage factory kit — 1967 Chevrolet Corvette, p.57.
    Corvette (C3)
    • 1968 Factory-verified

      $384.45; 81 built

      GM Heritage factory kit — 1968 Chevrolet Corvette, p.7.
    • 1969 Factory-verified

      $384.45; 115 built

      GM Heritage factory kit — 1969 Chevrolet Corvette, p.5.

    Related codes · mentioned in these notes

    J50Z28

    This page aggregates every documented appearance of J56 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.