Reference Details
- Availability
- optional · 1965 Pontiac Grand Prix
- Category
- performance · 1965 Pontiac Grand Prix
- Code
- 421 4-bbl · 1965 Pontiac Grand Prix
- Confidence
- documented · 1965 Pontiac Grand Prix
- Notes
- 10.5:1 premium-fuel engine with high-performance dual exhaust. · 1965 Pontiac Grand Prix
- Availability
- optional · 1966 Pontiac Grand Prix
- Category
- performance · 1966 Pontiac Grand Prix
- Code
- 421 4-bbl · 1966 Pontiac Grand Prix
- Confidence
- documented · 1966 Pontiac Grand Prix
- Notes
- 10.5:1 premium-fuel engine; price varied by the replaced standard power team. · 1966 Pontiac Grand Prix