SBC Rocker Arm - 1.5 Ratio 7/16 Stud

The SBC Rocker Arm - 1.5 Ratio 7/16 Stud from SHARP ROCKERS is purpose-built for small block Chevy engines requiring precise valve lift control and reliable rocker geometry. Whether you're building a street performance engine, a vintage restoration, or a dedicated racing platform, this full roller rocker delivers the consistency and durability that separates amateur builds from professional-grade powerplants. The 1.5:1 ratio is a proven sweet spot for naturally aspirated applications, offering improved valve lift and duration characteristics without sacrificing reliability or requiring extensive cylinder head modification.

Machined from premium aluminum and finished in orange anodize for corrosion resistance and heat dissipation, this rocker arm features a full roller design that minimizes friction across the pushrod interface and reduces wear on the camshaft lobe. The 7/16-inch stud mount configuration ensures secure attachment to your cylinder head while maintaining precise valve actuation geometry. Roller rockers eliminate the flat-bottom contact inherent to stamped arms, allowing the pushrod to roll smoothly rather than bind—this translates to more efficient valve events, reduced parasitic losses, and extended component life even under sustained high-RPM operation.

This rocker arm is essential for any small block Chevy platform using adjustable pushrods and a conventional stud-mounted rocker setup, including street engines, crate motor builds, and competition platforms. Installation requires accurate pushrod length calculation—a difference of even 0.050 inch will affect valve lash geometry and engine performance. The 1.5:1 ratio pairs ideally with aggressive camshafts in the 235–260-degree duration range and works across a wide spectrum of displacements from 283 to 400+ cubic inches. Each rocker arm is sold individually, so verify your complete rocker arm set count before ordering.