Big Block and FE 390-428, 429, 460, Retro-Fit Roller Lifter for Early Model Blocks Originally Equipped with Flat Tappet Cam
- Performance replacement for stock hydraulic Roller lifters or retro-fit hydraulic Roller lifters for non-Roller blocks
- Decrease friction and increase longevity when directly compared to flat tappet lifters. Accept much more aggressive Cam profiles than flat tappet lifters will allow
