SBF Sportsman R/A's - 1.6 Ratio 3/8 Stud

The PRW Industries SBF Sportsman R/A's with 1.6 Ratio 3/8 Stud are precision roller rocker arms engineered for small block Ford and AMC engine builds. This complete set of 16 rocker arms delivers the geometry and durability required for sustained high-rpm operation on the street, strip, or dyno. The 1.60:1 mechanical advantage ratio balances valve lift responsiveness with valve spring loading, making these arms suitable for both naturally aspirated and moderately boosted applications where reliability matters.

Each arm features a roller tip design that reduces friction against the pushrod and minimizes wear on valve stems under continuous cycling. The 3/8-inch stud mount provides a proven, industry-standard attachment point compatible with stock and aftermarket small block Ford heads. Steel construction with natural finish means these arms are ready to integrate into existing engine packages without fitment complications. The 1.6 ratio specification is a critical parameter—it determines how much the rocker multiplies pushrod motion, directly affecting valve opening speed and duration at the cylinder head.

These rocker arms are designed for builders and engine shops assembling or refreshing small block Ford and AMC powerplants. Whether you're restoring a classic, building a performance street engine, or setting up a race application, matching rocker arm ratio to your camshaft profile and intended rpm range is essential for consistent valve timing and prevention of valve float. The set of 16 covers all eight cylinders with a spare set, accommodating future rebuilds or experimentation with different cam grinds without purchasing additional hardware.