Crower Rocker Arms: Strength, Precision, and Proven Performance

Crower rocker arms represent the perfect balance of strength, precision, and innovation — engineered to deliver maximum valvetrain efficiency in both high-performance street engines and professional race applications. With decades of experience in precision machining and valvetrain design, Crower has earned a reputation as one of the industry’s most trusted names in rocker arm technology. Every Crower rocker is designed, machined, and assembled in the USA, reflecting the company’s deep commitment to quality, craftsmanship, and American manufacturing excellence.

At the core of Crower’s rocker arm design is a focus on durability and accuracy under extreme conditions. Each rocker is CNC-machined from premium materials such as aircraft-grade stainless steel, or billet steel, ensuring superior rigidity and fatigue resistance. This strength allows the rocker to maintain precise valve motion and geometry even at high RPM, minimizing flex and eliminating power-robbing deflection. The result is improved valve lift consistency, enhanced throttle response, and increased horsepower potential.

Crower’s roller rocker arms feature high-quality trunnion bearings and precision-ground roller tips designed to reduce friction between the rocker and the valve stem. Customers can choose between optional rollerized tips or Crower’s standard tip design, both available with an optional DLC-coated rocker tip axle for enhanced durability and reduced friction. Additionally, Crower’s rocker arm lineup includes both the standard OEM-style stud mount and the highly regarded STR rocker shaft system, each fully rebuildable for extended service life and long-term performance tuning flexibility. These features collectively ensure smoother operation, improved lubrication, and longer component life in even the most demanding racing environments

Available in multiple ratios and configurations, Crower rocker arms can be tailored to suit a variety of cylinder head designs and camshaft profiles. From small-block and big-block Chevrolet applications to Ford, Mopar, and custom race engines, Crower’s extensive catalog provides options for virtually every performance builder. Each set undergoes rigorous inspection and assembly procedures to guarantee uniformity, balance, and long-term reliability.

Crower’s heritage in motorsports engineering runs deep. Founded by Bruce Crower in the 1950s, the company has continually pushed the boundaries of performance innovation. From NHRA drag racing to off-road endurance and marine power, Crower rocker arms have proven their ability to withstand punishing conditions while delivering precise, repeatable valve control.

When performance, longevity, and precision matter most, Crower rocker arms stand out as the ultimate choice for serious engine builders and racers. Engineered with uncompromising attention to detail, they embody the same spirit of innovation and quality that has defined Crower for generations.

Be sure to stop by the Crower booth (#1419) at the PRI Show to learn more about our Rocker Arms and see what’s new for the 2026 race season!