Reference Details
- Availability
- optional
- Category
- performance
- Code
- M20/M21 context
- Confidence
- reported
- Notes
- Four-speed availability is reported for the 454 and higher-output 350 paths; exact unit requires car-level evidence.
Option reference
M20/M21 context Four-speed manual transmission
performance · optional
Cars With This Option
1 linked car page.
1973 Chevrolet
1973 Chevrolet Chevelle SS 454
1973 Malibu-series SS option with LS4 454 evidence