COMP CAMS Retro-Fit Hyd Rlr Lifters 348, 409 BBC COM8959-16

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 - Chevy Big Block 348-409 Retro-fit lifter for blocks originally equipped with flat tappet cams. Specifications: .842" Diameter, 136g Weight, 2.47" Seat Height.