Rocker Arm - SBC 1.6 Ratio 7/16 Stud

The Rocker Arm - SBC 1.6 Ratio 7/16 Stud from Crower is a precision-engineered valve train component designed for serious small block Chevy performance builds. Whether you're building a street machine, weekend racer, or restoration project, this full roller rocker arm replaces the factory stamped steel design with a purpose-built solution that improves valve actuation efficiency and durability under high RPM conditions. The 1.6 ratio mechanical advantage directly increases valve lift, allowing larger intake and exhaust valve events that flow more air into and out of the combustion chamber—critical for engines running aggressive cam profiles.

This rocker arm features a full roller design with a hardened, sealed roller bearing on the pushrod cup, which dramatically reduces friction compared to stock flat-tappet designs and minimizes wear during extended high-revving sessions. The stainless construction resists corrosion and heat discoloration while maintaining dimensional stability across thermal cycles—essential when engine bay temperatures exceed 250°F. The 7/16-inch stud mount interface ensures secure installation into your small block Chevy cylinder head, and the 1.6 ratio geometry is precisely machined to maintain consistent valve timing events across the RPM range without introducing binding or clearance issues that could cause valve float or missed lifter contact.

This rocker arm suits builders upgrading from factory components on any small block Chevy engine family—265, 283, 302, 327, 350, or 400 cubic inch platforms—particularly those pairing high-lift cam profiles with ported cylinder heads or performance fuel injection systems. Installation requires compatible push rods, guideplates to prevent side loading, and a valve spring package rated for the increased lift event. Each rocker arm is sold individually, so a complete set requires eight units for a standard V8 configuration. Verify stud diameter and length compatibility with your specific cylinder head casting before purchase to ensure proper fit and eliminate potential clearance complications during assembly.