SBC Shaft Rocker Arm Kit 1.60/1.60 Ratio

The SBC Shaft Rocker Arm Kit 1.60/1.60 Ratio from T AND D MACHINE is purpose-built for small-block Chevy engine builders seeking precision valvetrain control and reliable high-RPM performance. Whether you're assembling a street performance engine, a weekend bracket racer, or a dedicated track-focused build, this rocker arm kit delivers the mechanical advantage needed to optimize valve lift and duration across your entire RPM band. Small-block Chevy platforms remain the most popular base for affordable yet potent engine modifications, and quality rocker arms are fundamental to converting cam profile into actual cylinder head flow.

The 1.60/1.60 ratio designation indicates equal mechanical advantage on both intake and exhaust valves, delivering a 1.6:1 multiplication factor that amplifies cam lift throughout the valve event. Shaft-style rocker arms provide superior stability and reduced deflection compared to individual pedestal designs, especially under high valve spring pressures and sustained high-RPM operation. T AND D MACHINE manufactures these components to tight tolerances, ensuring consistent geometry that translates directly to predictable valve timing and lift characteristics. The precision-ground shaft and hardened rocker arm bodies resist wear and maintain clearances across thousands of combustion cycles, critical for engines running aggressive cam profiles or extended track sessions.

This kit suits builders working with 265–400 cubic inch small-block Chevy platforms equipped with traditional shaft-mounted valvetrain geometry. Installation requires proper pushrod length selection and baseline valve lash adjustment to maximize the kit's performance potential. Compatibility depends on your specific cylinder head casting (intake and exhaust port configurations) and existing rocker arm pedestals or mounting surfaces. Weighing 16.78 pounds, the complete kit integrates seamlessly into rebuild sequences and pairs effectively with aftermarket cam profiles, upgraded valve springs, and modern ignition systems for cohesive engine performance.