General Motors option code
MM4 — 4-speed manual
MM4 (4-speed manual): a General Motors factory option code recorded on 3 models across 1978–1981, with installs and price where a source states them.
3 models · 4 model years · 3 sources
Every sourced appearance
| Year | Model | As named that year | Price | Installs |
|---|---|---|---|---|
| 1978 | Chevrolet Chevy II and Nova | 4-speed manual RPO | $125 | Unknown |
| 1978 | Chevrolet El Camino SS | 4-speed manual RPO | $125 | Unknown |
| 1978 | Pontiac Firebird and Trans Am | 4 Speed Manual Transmission, Base Firebird and Esprit RPO/UPC | $125 | Unknown |
| 1978 | Pontiac Firebird and Trans Am | 4 Speed Manual Transmission, Formula RPO/UPC | $-182 | Unknown |
| 1979 | Chevrolet Chevy II and Nova | 4-speed manual RPO | $135 | Unknown |
| 1979 | Chevrolet El Camino SS | 4-speed manual RPO | $135 | Unknown |
| 1980 | Chevrolet El Camino SS | 4-speed manual RPO | $144 | Unknown |
| 1981 | Chevrolet El Camino SS | 4-speed manual (LG4 only) RPO | $141 | Unknown |
| 1981 | Pontiac Firebird and Trans Am | 4 Speed Manual Transmission RPO/UPC | Unknown | Unknown |
Every row traces to the source it links from on that model's own year page; this table only collects them in one place.