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.
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