Crower 66421-2 Features:

Crower retro-fit hydraulic roller lifters for 396-454 Chevy V8 engines Precision flow-checked for optimum leak-down rates and hydraulic reliability CNC-machined, heat-treated bodies with redesigned bearings for wear resistance Captive blades use an orbit-formed locking mechanism for permanent spool attachment

Retro Fit Hydraulic Rolle Cnc-machined Heat-treated Bodies Pair Features:

• Retro-fit hydraulic roller design for early-style 396-454 Chevy V8 blocks, hydraulic reliability with roller valvetrain performance and drop-in installation convenience
• Precision flow-checked internals for optimum leak-down rates, supporting consistent hydraulic operation and dependable valvetrain control under performance use
• CNC-machined, heat-treated body construction for enhanced wear resistance, paired with redesigned bodies and bearings for improved service durability
• Captive blade design with orbit-formed locking mechanism for permanent spool attachment, helping maintain secure assembly without loosened retaining components
• Unique orbit-formed pin eliminates snap rings that could come loose, pair-packaged configuration for part number 66421-2 installation and replacement flexibility