COMP CAMS Retro-Fit Hyd Rlr Lifters Olds/Pontiac COM857-16

Link Bar Retro-Fit Hydraulic Roller Lifters (Patent Pending). Precise piston fit for lowest leakdown rate. Patent-pending piston allows trapped air to escape lifter for faster "pump up". Axles produced from premium 52100 heat-treated Steel for increased wear resistance and overall strength. Lightweight body design. Includes (16) lifters. Applications: Oldsmobile V8 Retro-fit Roller lifters for blocks originally equipped with a flat tappet cam. Will not clear stock intake or Edelbrock #3711. Pontiac V8 Retro-fit Roller lifters for blocks originally equipped with a flat tappet cam. Specifications .842" Diameter, 136g Weight, 2.47" Seat Height.