Crower 66915JX980-1 Features:

Crower mechanical solid flat-tappet lifter with Cool Face direct oiling for Ford 221-351 and 429-460 V8 applications 0.874 in. OD, 1.640 in. seat height, and 97 g weight for direct-fit valvetrain installation and consistent geometry Precision-machined 0.024 in. face oil-metering port delivers targeted cam lobe lubrication with minimal oil pressure loss Designed for high-rpm, high-rocker-ratio, and high-spring-pressure setups to improve cam and lifter service life

Solid Lifters Cool Face J Ford 221-351/429-460, 0.874 In. Features:

• Cool Face face-oiling design for improved cam and lifter lubrication in high-rpm valvetrain applications
• 0.874 in. OD mechanical solid flat-tappet lifter for Ford 221-351 and 429-460 V8 engines in direct-fit form
• 0.024 in. precision oil-metering port helps maintain oil pressure while feeding the cam lobe directly
• 1.640 in. seat height and 97 g weight support consistent valvetrain geometry and controlled operation
• Direct-fit solid lifter design for solid flat-tappet camshafts under high spring pressure and rocker ratios