SBC 220 Sport Comp Shaft R/A Kit 1.50/1.50 Ratio

The SBC 220 Sport Comp Shaft R/A Kit 1.50/1.50 Ratio from T AND D MACHINE is designed for small-block Chevrolet enthusiasts who are looking for improved rocker arm geometry and optimized valve actuation. This kit is ideal for sport and high-performance street applications, providing the mechanical precision necessary to enhance valve event efficiency without the complexities of full race setups.

The 1.50/1.50 ratio indicates a balanced setup that offers a direct 1.5:1 mechanical advantage for both intake and exhaust valve trains. This design utilizes precision-ground hardened steel, ensuring tight manufacturing tolerances that minimize deflection and wear, which are common with cast OEM rockers. The optimized contact geometry at the valve stem reduces side loading, thereby extending component life and improving valve sealing integrity.

This kit is particularly beneficial for small-block Chevy builders seeking a balance between stock reliability and race-level performance, making it suitable for street machines equipped with mild to moderate cam profiles. Whether upgrading a classic 350 or tuning a modern crate engine, this rocker arm assembly ensures consistent and reliable valve control across the RPM range.