Professional Products 91003 Harmonic Balancer Counterweight for Small Block Chevy 400

The Professional Products 91003 is a bolt-on harmonic balancer counterweight designed specifically for Small Block Chevy 400 engines. This essential component allows for the conversion of an internal balance harmonic damper to external balance configuration, making it ideal for 383 and 400 cubic inch assemblies that require external balancing.

Key Features:

• Constructed from durable steel with zinc oxide finish for corrosion resistance
• Bolt-on design for easy installation with mounting hardware included
• Enables conversion from internal to external balance configuration
• Compatible with Professional Products Powerforce harmonic dampers
• Precision-engineered to provide proper counterweight balance for SBC 400 applications

This counterweight is an essential component for externally balanced Small Block Chevy engines, particularly 383 and 400 cubic inch builds. The bolt-on design provides versatility for engine builders, allowing a single harmonic damper to be adapted for different balance requirements. Professional Products manufactures this counterweight to exacting standards, ensuring proper engine balance and smooth operation.