SKU: PFM440-868
UPC: 037995710492
MPN: 440-868
The PROFORM BBM Shaft Mount Roller Rockers are precision-engineered rocker arm assemblies designed for serious Mopar B and RB-series engine builders and street enthusiasts who demand reliable valve actuation and reduced friction at high RPM. This complete 16-piece set eliminates guesswork by including all necessary shafts and hardware, making installation straightforward for both professional shops and experienced home mechanics. Roller rockers have become the gold standard in modern engine builds because they dramatically reduce parasitic losses and allow for more aggressive cam profiles without risking rocker wear.
The 1.50 ratio design provides a mechanical advantage that optimizes valve lift and duration characteristics, translating cam profile data more efficiently to the valve train while maintaining durable, predictable geometry. Unlike stamped steel rockers, these aluminum roller rockers feature sealed roller bearings that reduce friction across the pushrod contact point—a critical advantage when pushing engine speeds beyond 6,000 RPM or running solid roller cams. The shaft-mounted design ensures consistent geometry across all rocker pairs and eliminates the deflection issues common in stud-mounted alternatives, resulting in more precise valve timing even under high-load conditions. Aluminum construction keeps overall valve train weight minimal, reducing inertial losses and enabling faster rocker acceleration.
These rocker arms excel in high-performance street builds, small-block and big-block Mopar restorations, and dedicated race engines where cylinder head modifications demand reliable, repeatable performance. The complete shaft and hardware package fits Mopar B-series (318, 340, 360) and RB-series (383, 400, 440) engines without requiring additional adapters or sourcing. Proper installation requires correct pushrod length measurement and initial valve lash adjustment; consult your engine builder's specifications to ensure optimal rocker geometry and avoid valve train interference.
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