Crower 84518 Features:

Crower 84518 solid roller lifter, spring and retainer kit for Ford 221, 225, 260, 289, 302 and Boss 302 V8 engines Includes 16 roller lifters, 16 dual valve springs, 16 titanium retainers and 16 oil seals for a complete valvetrain package Race-only kit supports 8,000+ rpm and uses lightweight titanium retainers for high-rpm valvetrain control Valve springs rated 262 lb seat pressure at 1.850 in., 625 lb nose pressure at 1.200 in., with 1.110 in. coil bind height

Roller Lifter Kit Ford Du Dual Spring Titanium Retainers Features:

• Fits Ford 221, 225, 260, 289, 302, and Boss 302 V8 solid roller valvetrain applications for broad small-block compatibility
• Complete 64-piece kit with 16 roller lifters, 16 dual springs, 16 titanium retainers, and 16 oil seals for a matched valvetrain package
• Dual-spring setup with lightweight titanium retainers for improved high-rpm valvetrain stability, control, and reduced moving mass
• 68543-16 springs rated 262 lb at 1.850 in., 625 lb at 1.200 in., 1.110 in. coil bind, supporting 8,000+ rpm operation
• Race-only design requiring cylinder head machine work for proper installation in demanding high-performance engine builds