Counterweight for SBC 400

The Counterweight for SBC 400 from Professional Products is a precision-engineered harmonic balancer component designed for small block Chevy engines. This bolt-on counterweight addresses engine vibration at the crankshaft, a critical factor in maintaining driveline integrity and reducing fatigue on internal components. Whether you're building a reliable daily driver, race engine, or tactical vehicle platform, proper harmonic balancing is non-negotiable for longevity and performance.

Constructed from steel with a zinc oxide finish, this counterweight delivers corrosion resistance and durability in demanding engine bay environments. The compact design measures 1.7 x 1.2 x 4.55 inches and weighs just 0.8 lbs, ensuring minimal impact on overall harmonic balancer assembly weight while maximizing vibration dampening effectiveness. All required hardware is included, streamlining installation and eliminating sourcing delays during engine assembly or rebuild operations. The zinc oxide coating protects against moisture and salt exposure, critical for vehicles operated in coastal or harsh weather conditions.

This counterweight is engineered specifically for small block Chevy platforms and integrates seamlessly with Professional Products harmonic balancer systems. Technicians and engine builders rely on this component for SBC 400 applications where OEM or upgraded balancer assemblies require precision counterweight tuning. Installation is straightforward—bolt-on design means no specialized equipment or complex modifications are necessary. For operators maintaining fleet vehicles, performance builds, or equipment engines, the Counterweight for SBC 400 represents a cost-effective way to ensure proper crankshaft balance and extend engine service life.