Pro Shaft Rocker Kit BBC 1.70/1.70 Profiler

The Pro Shaft Rocker Kit BBC 1.70/1.70 Profiler from JESEL is a premium shaft-mount rocker arm assembly engineered for big block Chevy engines requiring precise valve actuation and high-lift performance. This 16-piece set delivers the consistent geometry and durability that professional engine builders and serious performance enthusiasts demand when maximizing cylinder head efficiency on Profiler-head applications. Designed for racing, high-output street builds, and dyno development, this rocker kit addresses the critical need for reliable valve train control under extreme operating conditions.

The 1.70-to-1.70 rocker ratio provides a balanced mechanical advantage that amplifies cam lift while maintaining stable pushrod geometry across the entire valve lift curve. Each rocker arm features full roller contact surfaces and a shaft-mount design that ensures minimal deflection and consistent valve timing even under aggressive lift schedules. The naturally finished aluminum construction keeps rotating mass low, reducing valvetrain inertia and enabling higher RPM capability without sacrificing durability. This configuration is particularly effective on Profiler cylinder heads, where the rocker geometry complements the head's port and combustion chamber design for optimal flow and ignition characteristics.

Builders targeting 400+ cubic-inch big block Chevy platforms will find this Pro Shaft Rocker Kit essential for consistent valve control and repeatable power output across multiple engines or build iterations. The complete 16-piece set (eight intake, eight exhaust) simplifies ordering and ensures matched geometry throughout the valve train. Installation on Profiler-head equipped motors requires proper shaft alignment and pushrod length verification; professional machine shop installation is recommended to achieve maximum reliability and performance. This kit represents an investment in precision that pays dividends through improved cylinder fill, faster valve transitions, and extended component life under racing or high-boost conditions.