Crower 66000J-12 Features:

Crower 66000J-12 hydraulic flat tappet lifter set, 12-piece, made in the USA by Hylift/Johnson. Fits applications using 0.842 in. OD lifters; seat height is 1.700 in.; each lifter weighs about 96 g. Ball-check oil control valving helps maintain proper hydraulic function across the valvetrain. Precision-ground radius faces are designed to support quick, proper break-in on flat tappet camshafts.

Hydraulic Johnson Lifters 0.842 In. Od, Usa-made, Hydraulic Flat-tappet Features:

• 0.842 in. OD flat-tappet lifters for Chevrolet 8-cylinder valvetrains, hydraulic design for consistent lash control
• Ball-check oil control valving for stable oil metering, smoother operation, and reliable hydraulic lifter performance
• Precision-ground radius faces promote quick break-in, helping protect cam lobes during flat-tappet camshaft installation
• Upgraded snap rings improve valvetrain function and lifter retention under demanding street and performance use
• Use new lifters with new camshafts to reduce premature wear; 1.700 in. seat height, approx. 96 g weight