Rocker Arm - BBC 1.7 Ratio 7/16 Stud

The Rocker Arm - BBC 1.7 Ratio 7/16 Stud from CROWER is a precision-engineered valvetrain component designed for Big Block Chevy (BBC) high-performance engines. This full roller enduro rocker arm is built for builders and enthusiasts who demand reliable, consistent valve actuation under demanding conditions. The 1.70 mechanical advantage ratio delivers increased valve lift, enabling superior breathing characteristics and optimized engine performance across a wide RPM range.

Manufactured from stainless steel construction, this rocker arm features a full roller design that minimizes friction at the valve stem contact point, reducing parasitic losses and extending component lifespan. The 7/16-inch stud mount provides secure attachment to BBC cylinder head configurations, ensuring repeatable geometry and eliminating lateral deflection during high-load valve events. The 1.7 ratio amplification means that for every 1 inch of camshaft lobe lift, the rocker arm produces 1.7 inches of valve lift—a critical specification for maximizing flow potential in ported or heavily modified heads.

This component is ideal for street performance, bracket racing, and engine rebuild applications where valvetrain reliability and repeatability are non-negotiable. The stainless material resists corrosion and thermal stress, making it suitable for both naturally aspirated and forced-induction platforms. Installation requires proper pushrod length verification and valve clearance adjustment to ensure optimal seating. Each rocker arm ships individually, allowing builders to replace worn units or construct complete valvetrain assemblies for BBC applications ranging from 396 to 454 cubic inch engines.