Use in Blocks Originally Equipped w/ Hydraulic Roller Cam & in COMP Cams® Ford Retro-Fit Kit for 351W, 351C, 400M, 289-302 and 351M
• 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