SBC Roller Rocker Arms - 1.5 Ratio 3/8 Stud NB/SA

The SBC Roller Rocker Arms – 1.5 Ratio 3/8 Stud NB/SA from PRW Industries represent a precision upgrade for small-block Chevrolet engine builders and high-performance enthusiasts. These roller rocker arms are engineered for engines demanding reliable valve actuation at elevated RPM ranges, whether you're building a street performance engine, bracket racing platform, or weekend warrior project. The 1.5:1 mechanical advantage ratio provides a balanced approach to valve lift and duration multiplication, making these arms suitable for both naturally aspirated and supercharged applications within the small-block Chevrolet family.

Roller rocker arm technology eliminates the friction inherent in traditional stamped steel designs by utilizing hardened roller bearings at the pushrod contact point and valve stem interface. This reduced friction translates to more consistent valve timing, improved fuel efficiency, and reduced parasitic drag on your engine's rotating assembly. The 3/8-inch stud configuration ensures compatibility with standard small-block cylinder head bolt patterns, while the NB/SA designation indicates compatibility with both non-bowtie and small-angle valve covers. PRW Industries manufactures these components with precision-machined aluminum bodies and hardened steel components to withstand sustained high-RPM operation without deflection or wear.

Installation requires proper pushrod length verification and correct preload adjustment during assembly—critical steps that directly affect valve timing accuracy and component longevity. These roller rocker arms excel in applications ranging from small-block Chevy 350s to 383 stroker combinations and work seamlessly with aftermarket camshafts, composite pushrods, and modern cylinder head designs. Weighing 6.55 pounds for the complete set, they offer a weight-neutral upgrade over stock rockers while delivering measurable improvements in power delivery and reliability. Proper installation with quality fasteners and torque specifications ensures years of maintenance-free operation in both street and competition environments.