SBC 220 Sport Comp Shaft R/A Kit 1.60/1.60 Ratio

The SBC 220 Sport Comp Shaft R/A Kit 1.60/1.60 Ratio is a precision rocker arm assembly engineered for small block Chevrolet engines seeking enhanced valve lift and duration control. This shaft-mounted system delivers the mechanical advantage necessary for serious performance builds, bracket racing, and street/strip applications where optimized valve event timing directly impacts horsepower and throttle response. The 1.60 ratio configuration provides measurable lift multiplication, allowing builders to extract more aggressive cam profiles without excessive valve train stress.

Built by T AND D MACHINE, a respected manufacturer of competition-grade valvetrain components, this kit features full roller rocker arms constructed from lightweight aluminum to reduce inertial losses and improve rev capability. The 0.220-inch offset geometry and 1.60 mechanical advantage ratio work in concert to optimize valve opening velocity and duration, critical factors in high-RPM engine efficiency. Shaft mounting provides superior stability compared to stud-mounted designs, ensuring consistent valve timing across the RPM band and minimizing deflection under aggressive valve spring pressures. The natural aluminum finish resists oxidation while maintaining a professional appearance in the engine bay.

This rocker arm kit is ideal for small block Chevy enthusiasts—whether you're running a circle track package, drag racing platform, or high-performance street engine—who demand repeatable valve events and maximum valvetrain reliability. Installation requires proper shaft alignment and spring pressure verification; compatibility with your specific cylinder head casting and pushrod length must be confirmed before assembly. The complete kit format simplifies sourcing, ensuring all components are matched for optimal performance. For builders pushing beyond stock specifications, this T AND D MACHINE solution delivers the precision and durability required for sustained competition-level operation.