Crower 66000RM4-16 Features:

Crower 66000RM4-16 premium Rev Max hydraulic flat tappet lifters for small block and big block Chevy V8 applications, sold as a 16-piece set. Dual Cam Saver oiling uses a precision 0.0025 in. groove from the oil band to the lifter face to deliver 20% to 30% more oil to the cam lobe surface. Slow leak-down design helps improve valvetrain stability at high rpm and can support an estimated 300 to 400 rpm gain over standard hydraulic lifters. Severe-duty construction includes an approximately 65RC super hard wear surface, precision-ground radius face, superior finish, and heavy-duty snap ring.

Hydraulic Lifters Premium Rev Max Dual Camsaver Oiling High-rpm Features:

• Slow leak-down design for improved valvetrain stability and estimated 300 to 400 RPM gain in high-rpm use
• Dual Cam Saver oiling groove feeds 20% to 30% more oil to cam lobes and lifter faces for wear protection
• Super hard 65RC wear surface with precision-ground radius face for fast break-in and reliable flat-tappet operation
• Heavy-duty snap ring supports severe-duty, racing use and helps control under high spring pressures and high-rpm loads
• Fits small-block and big-block Chevy V8 applications; 0.842 in. OD lifters, set of 16, requires high-volume oil pump