BBC Rocker Arms - 1.8 Ratio 7/16 Stud

The BBC Rocker Arms - 1.8 Ratio 7/16 Stud are essential components for serious big-block Chevrolet engine builders and street performance enthusiasts. These rocker arms are designed to enhance valve lift and duration, improving cylinder head flow and combustion efficiency across a broad RPM range. Whether you're constructing a carbureted street engine or upgrading an existing big-block platform, these rocker arms are critical for optimizing power output and reliability.

The 1.8 ratio design effectively multiplies cam lobe lift by 1.8 times, offering significant valve lift improvements over standard 1.5 ratio arms. The 7/16-inch stud configuration ensures compatibility with standard BBC cylinder heads, providing secure clamping force that resists deflection under high valve spring pressures. Manufactured with precision-machined steel and hardened contact surfaces, these rocker arms minimize wear on valve stems and pushrods while maintaining tight tolerances for proper valve clearance and lash adjustment.

These rocker arms are suitable for various BBC applications, including 427, 454, and 502 displacement engines. They are particularly beneficial for setups where enhanced performance is desired, especially in high-performance street and track environments. Proper installation requires accurate stud height adjustments to ensure optimal performance and longevity.