SBC Pro Magnum R/A's 1.52 Ratio 3/8 Stud

The SBC Pro Magnum R/A's 1.52 Ratio 3/8 Stud rocker arm assembly from COMP CAMS is engineered for small-block Chevrolet engines demanding precision valve control and consistent lift characteristics. Built for both street and competition applications, these roller rocker arms eliminate the friction and wear inherent in traditional stamped-steel designs. Whether you're tuning a mild 350 or pushing a race-prepped 383, this 1.52:1 ratio directly controls how much valve lift your camshaft profile delivers to the cylinder head.

The 1.52 ratio multiplies cam lift by 1.52 times, a proven specification that balances aggressive valve opening with reliable seating geometry on LS-style and big-port cylinder heads. The 3/8-inch stud design ensures compatibility with modern SBC block preparations and provides secure, repeatable mounting without valve-to-piston or valve-to-head interference issues. COMP CAMS' roller design reduces parasitic drag on the camshaft, freeing horsepower while extending component lifespan under sustained high-RPM operation. The precision bearing surfaces and hardened alloy construction withstand repeated cycling at 6,500+ RPM without deflection or premature wear.

This rocker arm set is ideal for builders upgrading from factory stamped rockers to a performance roller setup, or for engine rebuilds prioritizing repeatability and durability. Compatibility extends across most small-block Chevrolet applications with LS-head conversions, aftermarket cylinder heads, or stock 1987–2004 configurations using 3/8-inch stud patterns. Professional installation requires baseline valve lash setup and pushrod length verification to ensure proper clearances. Pair these rockers with a quality regind or performance cam profile to unlock the full potential of your small-block package.