Crower 66291X902-16 Features:

Crower Severe Duty Mechanical Roller Lifters for Big Block Chevy applications 0.903 in. outside diameter with cutaway lifter body design Special billet alloy body with lightweight construction for high-RPM use Heavy-duty raised blade and vertical link bar for late-model block fitment

Severe Duty Rollers BBC C 0.903 In. Od BBC Features:

• 0.903 in. OD mechanical roller lifters for BBC, severe-duty cutaway design for high-cylinder-pressure, high-rpm valvetrains
• Billet alloy body, lightweight construction, reduced valvetrain mass for stable operation at elevated rpm
• Heavy-duty raised blade, vertical link bar, fits late-model BBC blocks with added lifter control and stability
• Mechanical roller configuration, built for aggressive cam profiles, consistent valve action under severe-duty use
• Set of 16 lifters, precision-matched BBC fitment, performance-ready design for racing and high-load applications