Crower 66493HR-2 Features:

Crower severe-duty raised-seat mechanical roller lifter for BBC and Big Chief intake offset applications .842 in. lifter diameter with .750 in. bearing and .150 in. offset intake seat for valvetrain geometry +.300 in. pushrod seat height helps fit Dart BBC blocks without grinding lifter bores for pushrod clearance HIPPO high-pressure pin oiling improves roller bearing lubrication for severe-duty and racing use

Severe Duty Rollers Raise BBC/Big Chief Intake Offset Hippo Features:

• Raised-seat mechanical roller lifter, .842 in. body, .750 in. bearing, severe-duty valvetrain stability for BBC applications
• .150 in. intake offset with +.300 in. seat height, improves pushrod geometry and clearance in Big Chief and BBC builds
• HIPPO pin oiling system, enhanced roller bearing lubrication for greater reliability and longevity under high-rpm racing loads
• Right-side pair for cylinders 1, 4, 5, and 8, precision fitment for raised-seat intake-offset mechanical roller setups
• Higher pushrod seat helps avoid lifter-bore grinding in Dart BBC blocks, reducing block modification during engine assembly