Rocker Arm - 1.60 Ratio .375 Offset Left

The Rocker Arm - 1.60 Ratio .375 Offset Left by T and D Machine is a precision-engineered valve train component designed for serious engine builders and high-performance enthusiasts who demand reliable, consistent lift profiles. This left-hand rocker arm is specifically designed for the driver-side intake or exhaust valve in custom and modified engine builds, particularly in applications requiring specific mechanical advantage ratios and stud-mounted configurations.

The 1.60 rocker ratio multiplies camshaft lift by 1.6 times, increasing valve opening distance compared to a 1:1 ratio and improving volumetric efficiency at higher RPMs. The .375-inch stud offset positions the rocker fulcrum point precisely for optimal geometry with aftermarket and OEM performance camshafts, minimizing valve lash variation and reducing stress concentrations during extreme valve events. T and D Machine manufactures these rocker arms from hardened steel with precision machining tolerances, ensuring dimensional accuracy across thousands of cycles and extended engine operation.

This rocker arm is ideal for builders looking to enhance performance in specific small-block engine applications. Selecting the correct rocker arm ratio is fundamental to achieving target horsepower, fuel efficiency, and valve timing objectives. Ensure compatibility with your engine setup by using matching right-hand rocker arms for a complete cylinder head conversion.