Rocker Shaft - BBM 440

The T AND D MACHINE Rocker Shaft – BBM 440 is a precision steel rocker arm shaft engineered for Chrysler 440 engine builds. This component is critical for controlling valve actuation and maintaining proper rocker arm geometry across the full RPM range. The BBM 440 designation confirms compatibility with classic and stroker 440 Big Block engines, making it essential for both original restorations and modern high-performance rebuilds.

T&D Machine is known for manufacturing rocker systems to exacting tolerances, and this shaft reflects that standard. At 2.21 lbs and measuring 22.9 inches in length, the rocker shaft provides the structural foundation for the rocker arm assembly. Steel construction ensures durability under sustained valve train loads and thermal cycling typical of street and race applications. Proper shaft diameter and hardness are critical to prevent deflection under high spring pressures and to distribute loads evenly across all rocker pedestals.

This shaft is intended for builders and engine shops restoring or modifying Chrysler 440 engines, including applications with aftermarket rocker arm ratios, stud girdles, and custom cylinder head configurations. Whether you're rebuilding a original-spec engine or developing a performance platform, the rocker shaft must match your chosen rocker arm package. Verify compatibility with your specific rocker arms and pedestal configuration before ordering.

The 440 Big Block platform remains a popular choice for classic car restoration and hot rod applications due to its displacement potential and availability of performance components. T&D Machine rocker systems support everything from stock rebuild specifications to radical cam profiles and high-lift valve events.