Crower 66491-16 Features:

Crower 66491-16 severe-duty mechanical roller lifters for BBC and Dart blocks with .842 in. OD cutaway bodies and raised-seat design. +.300 in. taller body and higher pushrod seat help clear taller lifter bores and address valvetrain clearance issues in late-model BBC builds. CNC-machined, heat-treated 1-piece body with a .750 in. bearing and control-contoured tapered needle bearings for load capacity and cycle life. Premium stainless steel alignment blades use an exclusive orbit-formed locking mechanism for secure guidance in high-performance and racing engines.

Severe Duty Rollers Raise BBC .842 In. Od Raised-seat Features:

• Raised-seat design for +.300 in. taller lifter bores, solves valvetrain clearance issues in late-model BBC and Dart blocks.
• .842 in. OD cutaway body with .750 in. bearing, optimized for severe-duty mechanical roller valvetrain stability.
• CNC-machined, heat-treated 1-piece body for precise lifter control, strength, and improved cycle life under racing loads.
• Stainless steel alignment blades with orbit-formed locking mechanism for secure tracking and dependable high-rpm operation.
• Complete 16-piece set with control-contoured tapered needle bearings for superior load capacity in high-performance BBC builds.