BBM Rocker Arm - 1.5 Ratio

The BBM Rocker Arm – 1.5 Ratio by SHARP ROCKERS is a precision-engineered component designed for heavy-duty cylinder head applications on Mopar B and RB-series engines. Built for serious engine builders and performance enthusiasts, this left-side shaft mount rocker arm delivers the mechanical advantage and reliability required in high-revving, high-load combustion environments. Whether you're restoring a classic muscle car or building a street performance engine, the 1.5 ratio geometry directly impacts valve lift and timing dynamics across the entire RPM range.

This rocker arm features a roller tip design that minimizes friction and wear on the pushrod interface, extending component life and improving overall valvetrain efficiency. Constructed from aluminum and finished in orange anodize, the material selection balances weight savings with thermal stability while the protective coating resists corrosion in high-temperature engine bays. The 1.5 ratio specification means the rocker arm multiplies valve lift by 1.5 times the pushrod movement, a common choice for street and strip applications seeking responsive mid-range power without extreme valve motion. Precise manufacturing tolerances ensure compatibility with OEM and aftermarket pushrod configurations on B-body and RB-block platforms.

Engine builders working on Dodge, Plymouth, and Chrysler big-block applications will find this left-hand rocker arm essential for completing a full valve-actuation system. Sold individually, paired installation on both sides of the cylinder head allows you to match your existing rocker geometry or upgrade to a coordinated ratio set. Installation requires proper pushrod length selection and accurate torque procedures to the rocker shaft; consult your engine build manual for specifications. This component integrates seamlessly with standard Mopar rocker shaft systems and is compatible with both flat-tappet and roller-cam configurations on B/RB-series heads.