Pro Shaft Rocker Kit BBC 1.70/1.70 Profiler

The Pro Shaft Rocker Kit BBC 1.70/1.70 Profiler from JESEL is designed for serious big-block Chevrolet engine builders and high-performance mechanics who demand maximum RPM and valve lift. This precision rocker arm assembly replaces stock or outdated designs, enabling aggressive cam profiles and enhanced cylinder head flow characteristics that stock rockers simply cannot support. Built for nitrous, supercharged, and naturally aspirated competition engines, the Pro Shaft Rocker Kit delivers the valve actuation stability required in professional drag racing, road racing, and engine dyno applications where reliability and accuracy are essential.

The 1.70/1.70 ratio configuration means both intake and exhaust rockers feature a 1.70 rocker arm ratio, amplifying valve lift and velocity without requiring larger-diameter pushrods or additional valvetrain complexity. JESEL's Pro Shaft design utilizes needle-bearing equipped rocker arms mounted on a hardened steel shaft, minimizing friction losses and wear compared to traditional stud-mount rockers. The profiled geometry ensures consistent valve opening and closing events across the full RPM range, reducing valve float and maintaining precise valve timing—critical when running aggressive hydraulic or solid-roller camshaft profiles.

Machined from premium materials and finished to exacting tolerances, this kit supports sustained high-RPM operation and handles the shock loads typical in competition environments. Ideal for racers and performance enthusiasts, the Pro Shaft Rocker Kit is compatible with a variety of big-block Chevrolet applications, ensuring optimal performance in high-stakes racing scenarios.