Shaft Rocker Arm Kit SBC 1.6/1.5 Ratio

The Shaft Rocker Arm Kit SBC 1.6/1.5 Ratio is a precision-engineered valvetrain upgrade designed for small-block Chevrolet engine builders and performance enthusiasts seeking reliable, high-RPM capability. This shaft-mounted rocker arm system replaces traditional stud-mounted designs, delivering superior stability and repeatability across aggressive cam profiles and extended engine speeds.

Shaft rocker arm systems eliminate deflection common in stud-mount designs by distributing loads directly through a solid shaft, ensuring precise valve opening and closing geometry even under high valve spring pressures. The 1.6/1.5 ratio configuration provides a balanced approach, with the 1.6 ratio arms designed to increase valve lift effectively, while the 1.5 ratio side offers versatility for dual-pattern applications or mild-to-moderate lift requirements.

This dual-ratio design accommodates both intake and exhaust sides independently, allowing builders to optimize valve events for specific cylinder head flow characteristics and combustion chamber demands without sacrificing reliability or durability. Installation requires proper alignment with SBC head porting and compatible pushrods, making this kit ideal for builders upgrading beyond factory or entry-level components.