Crower 84521S Features:

Crower 84521S roller lifter kit fits Ford 351C, 351M, and 400 V8 engines. Includes severe-duty mechanical roller lifters, dual valve springs, and chromoly retainers. Kit also contains jumbo 3/8 in. locks, 3/8 in. keepers, and 11/32 in. oil seals. Dual springs deliver 236 lb seat pressure at 1.900 in. and 584 lb nose pressure at 1.200 in.

Roller Lifter Kit Ford 35 351C/351M/400 V8 Dual Spring Features:

• Complete kit with roller lifters, dual valve springs, retainers, 3/8 in. keepers, and oil seals for Ford 351C, 351M, and 400 V8 applications
• Severe-duty mechanical roller lifters for high-rpm valvetrain stability and precise valve motion in race-focused engine builds
• Dual-spring setup rated at 236 lb seat pressure at 1.900 in., 584 lb nose pressure at 1.200 in., with 1.100 in. coil bind
• Chromoly retainers, jumbo 3/8 in. locks, and 11/32 in. oil seals support secure installation and dependable valvetrain control
• Race-only valvetrain upgrade supports up to 8000 rpm and requires cylinder head machine work for proper fitment and performance