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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    M20 Factory-verified

    Chevrolet · Regular Production Option

    4-Speed Manual Transmission (wide ratio)

    Years 1963–82 Models 9 Factory citations 28

    Also described as 4-speed manual, wide ratio4-Speed Transmission4-Speed Manual Transmission4-speed manual, wide ratio (base)4 speed standard transmission4-speed manual4-speed manual transmissionChevrolet 4-speed manual4-speed manual (SM465; listed "Muncie")4-speed manual (Opel-built to 1972, Saginaw from 1973)4-speed Saginaw manual (base)

    Documented applications

    Camaro
    • 1967–1969 Factory-verified
      GM Heritage factory kit — 1967 Chevrolet Camaro, p.8.
      GM Heritage factory kit — 1969 Chevrolet Camaro, p.47.
    • 1970–1981 Factory-verified
      GM Heritage factory kit — 1970 Chevrolet Camaro, p.118.
      GM Heritage factory kit — 1978 Chevrolet Camaro, p.9.
    Chevelle / El Camino
    • 1964–1972 Factory-verified
      GM Heritage factory kit — 1964 Chevrolet Chevelle, p.64.
      GM Heritage factory kit — 1972 Chevrolet El Camino, p.6.
    Corvette (C1 / C2)
    • 1963 Factory-verified

      $188.30; 17,973 built (CAC lists 17,983)

      GM Heritage factory kit — 1963 Chevrolet Corvette, p.8.
    • 1964 Factory-verified

      $188.30; 19,034 built (kit: 10,538 wide-ratio + 8,496 close-ratio)

      GM Heritage factory kit — 1964 Chevrolet Corvette, p.17.
    • 1965 Factory-verified

      $188.30; 21,107 built

      GM Heritage factory kit — 1965 Chevrolet Corvette, p.14.
    • 1966 Factory-verified

      $184.35; 10,837 built

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

      $184.35; 9,157 built

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

      $184.35; 10,760 built

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

      $184.80; 16,507 built

      GM Heritage factory kit — 1969 Chevrolet Corvette, p.5.
    • 1973 Single-source

      $0.00; qty NA

    • 1977 Factory-verified

      $0.00; qty NA

      GM Heritage factory kit — 1977 Chevrolet Corvette, p.48.
    Monte Carlo
    • 1970–1971 Factory-verified

      rare on MC (349 in 1971)

      GM Heritage factory kit — 1970 Chevrolet Monte Carlo, p.66.
      GM Heritage factory kit — 1971 Chevrolet Monte Carlo, p.16.
    Nova / Chevy II
    • 1964–1967 Factory-verified
      GM Heritage factory kit — 1965 Chevrolet Nova, p.7.
      GM Heritage factory kit — 1967 Chevrolet Nova, p.8.
    • 1968–1977 Factory-verified
      GM Heritage factory kit — 1968 Chevrolet Nova Coupe, p.9.
      GM Heritage factory kit — 1977 Chevrolet Nova, p.10.
    C/K Trucks
    • 1963–66 Factory-verified
      GM Heritage factory kit — 1963 Chevrolet Truck, p.6.
      GM Heritage factory kit — 1965 Chevrolet Truck, p.19.
      GM Heritage factory kit — 1966 Chevrolet Truck, p.24.
    • 1967–72 Confirmed

      SM465 in trucks (car lists say Muncie)

    • 1973–82 Confirmed

      —

    Vega / Monza
    • 1971–1977 Factory-verified
      GM Heritage factory kit — 1971 Chevrolet Vega, p.10.
      GM Heritage factory kit — 1977 Chevrolet Monza, p.10.
    • 1975–1980 Factory-verified
      GM Heritage factory kit — 1975 Chevrolet Monza, p.8.
      GM Heritage factory kit — 1977 Chevrolet Monza, p.10.

    Related codes · mentioned in these notes

    107837

    This page aggregates every documented appearance of M20 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.