Pontiac Bonneville IV (B-body) [1965 .. 1970] 421 cid
- Generation: IV (B-body) [1965 .. 1970]
- Production: 1965 - 1970
- Sales regions: USA+
- Power:
- Engine: 6.9 L, V8, Petrol
- Center Bore / Hub Bore: 78.3 mm
- Bolt Pattern (PCD): 5x127 (5x5)
- Wheel Fasteners: Lug nuts
- Thread Size: 1/2" - 20 UNF