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 (12) lifters. Applications: Buick 231 V6 (Requiring shrouded wheel); Retro-fit Roller lifter for early model blocks originally equipped with flat tappet cam; Tall body fits both standard blocks and tall bore aftermarket blocks. Specifications: .842" Diameter 136g Weight 2.47" Seat Height.
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