Crower 74284F Features:

Crower 74284F shaft rocker system for Ford Racing Z2 heads Fits Ford 289, 302, and 351 engines with 5/8 in. shaft configuration Shaft-mount valvetrain design helps improve rocker stability in racing use Engineered as a performance upgrade for demanding Ford Racing engine builds

Shaft Rockers Ford Racing Z2 Heads 289/302/351 Engines 5/8 Features:

• Ford Racing Z2 head fitment for 289, 302, and 351 engines, application-specific shaft rocker system for performance valvetrain setups
• 5/8 in. shafts for increased rocker stability, improved valvetrain control under high-rpm racing conditions and demanding engine loads
• Shaft-mounted rocker design for precise geometry, reduced flex, and more consistent valve motion in performance-oriented Ford builds
• Performance valvetrain upgrade engineered for Ford Racing applications, optimized for strength, reliability, and stable operation at speed
• Premium shaft rocker system for race-focused small-block Ford combinations, supports dependable valvetrain performance and upgrade compatibility