BBC Roller Rocker Arm 1.8 Ratio 7/16 Stud

The Scorpion Performance BBC Roller Rocker Arm 1.8 Ratio with 7/16 Stud is designed for serious big-block Chevy builders who require precise valve actuation and reliable power delivery in high-RPM applications. This roller rocker arm assembly replaces traditional stamped steel rockers, enhancing valvetrain efficiency and responsiveness. It is ideal for street performance engines, weekend bracket racers, or vintage hot rods.

The 1.8 ratio geometry optimizes valve lift, meaning that for every inch of camshaft lift, the valve lift is multiplied by 1.8, improving flow and duration characteristics for peak cylinder charging. Roller rocker arms reduce friction losses by using a precision-ground roller bearing at the cam-lobe contact point. Scorpion Performance emphasizes tight tolerances, quality ductile-iron bodies, and hardened bearing races that withstand high-load cycles without wear.

These rocker arms are particularly beneficial for big-block Chevy engines equipped with aftermarket or ported cylinder heads. They are an excellent upgrade for users looking to enhance performance beyond OEM rockers, ensuring compatibility with modern aftermarket cylinder heads while maintaining proper geometry and valve clearance margins.