Crower 66491X903H-2 Features:

Crower Severe Duty mechanical roller lifters for BBC Big Dart Blocks; pair configuration with .903 in. OD cutaway bodies. Raised pushrod seat with .300 in. taller body helps clear the lifter bore and eliminates lifter-bore grinding for pushrod clearance. HIPPO high-pressure pin oiling meters oil directly to the needle bearings and pin for improved top-end lubrication. Billet alloy body with larger OD bearings and thicker walls is built for full-race, high-rpm use and extreme cylinder pressures.

Severe Duty Rollers Raise .903 In. Od BBC Raised-seat Features:

• Raised-seat design clears lifter bore and reduces pushrod clearance grinding on BBC Big Dart Block applications
• .903 in. OD mechanical roller lifters with .300 in. taller body for specialized raised-seat geometry
• HIPPO pin oiling feeds needle bearings and pin for improved top-end lubrication and extended valvetrain life
• Billet alloy body with larger OD bearings and thicker walls for high-rpm, extreme-cylinder-pressure race use
• Cutaway severe-duty roller lifter pair for full-race builds using high-impact camshafts and high oil flow