Trans Am Performance & Appearance package — $725

Years 1969–81, 1986–88, 1991–92 Models 2

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Also described as Trans Am package/model codeTrans Am, model conversion

Documented applications

Firebird / Trans Am

1969 Confirmed

689 coupes, 8 convertibles; L74 std
1970–1981 Confirmed

Listed by Trans Am Country & 78ta as the T/A model RPO

Firebird — Third generation (1982–1992)

1986–1988, 1991–1992 Single-source

1990 is left out because the 1990 3rdgenformula page names WS4 only inside the Y83 and Y84 price lines ("Trans Am (WS4 + Y83)"); Firebird years: thirdgen.org label decodes 1986; 3rdgenformula option pages 1987–1988, 1991–1992

This page aggregates every documented appearance of WS4 in the Pontiac reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.