BBM Pro-Mag Rocker Arms - Shaft Mnt. 1.5 Ratio

The BBM Pro-Mag Rocker Arms - Shaft Mnt. 1.5 Ratio by COMP CAMS is a precision engine component designed for serious performance builders and engine shops requiring maximum valve train stability and lift multiplication. Built for high-revving, high-horsepower applications, these rocker arms deliver the mechanical advantage and durability that law enforcement and military vehicle platforms demand when upgraded beyond OEM specifications. Whether you're building a patrol car interceptor package or a specialized tactical vehicle, shaft-mounted rocker arms provide the foundation for consistent, reliable power delivery under sustained high-load conditions.

The 1.5 ratio configuration amplifies camshaft lift by 50 percent, translating to greater valve travel and improved cylinder filling—critical for engines that demand maximum scavenging efficiency and responsiveness. Shaft mounting integrates the rocker assembly into a rigid, single-point support system, eliminating individual stud deflection and reducing valve train harmonics that compromise precision at elevated RPM. COMP CAMS engineering ensures consistent rocker geometry, minimizing parasitic losses through the valve train and maintaining exacting tolerances under thermal and mechanical stress. The robust construction withstands the cycling loads inherent in high-performance and emergency response duty cycles where reliability cannot be compromised.

Professional engine builders, fleet maintenance technicians, and dedicated enthusiasts select these rocker arms when OEM valve train geometry proves insufficient for power objectives exceeding 450 horsepower. Installation requires proper setup on a compatible shaft-mount platform; verify camshaft grind, pushrod length, and valve spring specifications before ordering. The 13.44 lb assembly integrates with COMP CAMS cam profiles and matching lifter packages to ensure harmonious operation across the entire valve train system.