SBC Sportsman R/A's - 1.5 Ratio 7/16 Stud

The SBC Sportsman R/A's - 1.5 Ratio 7/16 Stud by PRW Industries represent a purpose-built rocker arm solution for small-block Chevrolet engines pushing serious performance. Whether you're building a street machine, bracket racer, or high-RPM drag application, these rocker arms deliver the geometry and durability needed when stock components won't cut it. The 1.5 ratio multiplier is engineered specifically for Sportsman-class racing platforms where valve lift optimization directly impacts power delivery and engine efficiency.

PRW's design philosophy centers on precision manufacturing and material selection that handles sustained high-RPM operation. The 7/16-inch stud configuration provides a robust mounting interface that resists deflection under aggressive valve spring pressures—critical when running solid roller or mechanical roller camshafts in competition. The 1.5:1 ratio means your camshaft lift is multiplied by 50%, allowing builders to optimize valve timing events and port flow characteristics without requiring extreme cam duration. This geometry also reduces valvetrain mass at the rocker tip, improving response characteristics and reducing parasitic friction losses compared to heavier 1.6 or 1.7 ratio alternatives.

These rocker arms excel in competition environments where repeatability and reliability trump cost considerations. Bracket racers, weekend warriors, and engine builders working within Sportsman racing classes will appreciate the PRW Industries reputation for quality control and valve actuation consistency. Installation requires proper pushrod length verification and spring pressure validation—factors that become critical when transitioning from stock components. Compatible with SBC cylinder heads accepting 7/16-inch studs, these rocker arms integrate seamlessly into stroker builds, carbureted platforms, and EFI applications where maximum bang-for-the-buck cam geometry yields measurable track performance gains.