SBM R/A & Shaft Kit - 1.6 Ratio

The Sharp Rockers SBM R/A & Shaft Kit with 1.6 Ratio delivers heavy-duty rocker arm performance for small-block Mopar engines requiring shaft-mounted configuration. This aluminum assembly features a 1.60 mechanical advantage ratio designed to optimize valve lift and duration characteristics across the RPM range, making it a critical component for builders seeking to maximize engine response without compromising reliability.

The kit comes complete with roller-tip rocker arms that reduce friction at the valve stem contact point, extending service life and improving thermal management during sustained operation. The orange anodized aluminum construction provides corrosion resistance while keeping overall weight minimal—a priority for small-block Mopar applications where reciprocating mass directly impacts throttle response and fuel efficiency. The shaft-mount design ensures precise valve train geometry and allows for straightforward installation when upgrading from factory stamped-steel rockers.

This rocker arm kit is engineered for engine builders and enthusiasts working with small-block Mopar platforms—from street performance builds to track-focused applications. The 1.6 ratio strikes a practical balance between mechanical advantage and spring load requirements, making it compatible with both stock and mildly modified cam profiles. Proper installation requires correct shaft alignment and spring pressures; this kit is best paired with a complete valve train specification review to ensure harmonious operation across your intended power band.