BBM CM Rocker Arm Shafts 2pk

The PRW Industries BBM CM Rocker Arm Shafts 2-pack is a chromoly steel upgrade designed for builders who demand durability and precision in high-performance engine builds. These rocker arm shafts are engineered to replace worn factory shafts or support upgraded rocker arm ratios, making them suitable for various engine applications.

Manufactured from chromoly steel, these BBM CM rocker arm shafts deliver superior strength-to-weight characteristics compared to cast iron OEM units. This construction resists deflection and permanent deformation, which is critical when running higher valve spring pressures or extended RPM ranges, ensuring reliability under sustained load.

These shafts are ideal for a range of street and race applications where reliability is essential. Their engineering ensures proper journal diameters and surface finish for optimal rocker arm fit, directly impacting valve timing accuracy and reducing wear on both the shaft and rocker arm bore surfaces.