SBC 6-3/4in Harmonic Balancer - Int. Balance

The SBC 6-3/4in Harmonic Balancer - Internal Balance by PROFORM is a crucial component for small-block Chevrolet engines that require effective crankshaft vibration management. This balancer is designed for builders and enthusiasts who seek OEM-quality performance at an affordable price. It is suitable for various applications, including stroker motors, classic 350 rebuilds, and street machine upgrades.

This internally balanced harmonic balancer integrates counterweights directly into the assembly, eliminating the need for external balance weights on the flywheel or flexplate. This design minimizes parasitic drag, simplifies engine assembly, and enhances harmonic damping compared to externally balanced configurations. The 6-3/4-inch diameter is standard for small-block Chevrolet applications, and the elastomer-core construction effectively absorbs torsional vibrations that could harm bearings and internal components.

Ideal for SBC engine builds, including 283, 305, 327, 350, and 400-cubic-inch variants, this harmonic balancer ensures compatibility with internal balance rotating assemblies and flywheels. Installation is straightforward on freshly built or rebuilt short blocks, making it a valuable addition for any engine builder looking to enhance performance and reliability.