Professional Products 90001 PowerforcePlus Harmonic Balancer 6.75" SBC 400 External Balance SFI 18.1

The Professional Products 90001 PowerforcePlus harmonic damper is designed specifically for small block Chevy 400 cubic inch engines with external balance configurations. This high-performance balancer features a 6-3/4 inch diameter and is engineered to reduce harmful crankshaft vibrations while withstanding the rigors of high-performance applications.

Key Features:

• Removable external balance weight allows conversion to internal balance configuration for versatility
• 6-3/4" diameter designed for small block Chevy 400 engines
• Easy-to-read laser-etched timing marks for precise ignition timing
• Meets SFI Specification 18.1 for competition and high-performance use
• Durable construction for extended service life under demanding conditions

This SFI-certified harmonic balancer provides the durability and precision needed for both street performance and racing applications. The external balance design maintains proper engine balance for Chevy 400 engines, while the removable weight offers flexibility for engine builders working with different crankshaft configurations.