Pontiac 265-455ci V-8 1955-81
- Requires upgraded valve springs. (249-988-16)
- For Street Applications w/Lower Compression Ratios
- 1 Year Limited Warranty
Pontiac; Super Duty; SD; SD455; HO; 455 HO; Trans-Am; Catalina; Firebird; Formula; 421; 455; 400; 428; 350; 265; 301; 370; 389; 301; 287; 317; 347; Ram Air; Ram Air IV; Ram Air III; Bonneville; Grand Prix; LeMans; Parisienne; Grand Am; Century; Regal;
Good low end and mid-range torque. Street performance, noticeable idle.
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