SBC 6.1in Balancer Int. Balance - SFI

The PRO-RACE PERFORMANCE PRODUCTS SBC 6.1-inch Balancer Internal Balance harmonic balancer (Part Number 34265) is a precision-engineered component designed for small block Chevy engines requiring SFI 18.1 certification. This iron balancer measures 6.61 inches in outer diameter and delivers the vibration dampening control critical for high-revving marine powerplants and performance applications. Built to SFI standards, it ensures compliance with sanctioning body requirements for both competitive and recreational use.

The internal balance design integrates counterweight material within the balancer itself, making it compatible with internally balanced small block Chevy crankshafts. This configuration reduces overall vibration transmission to the engine block and drivetrain, improving longevity and smoothness across the RPM range. The iron construction provides thermal stability and durability under sustained high-load conditions. Weighing 10.21 pounds with compact dimensions of 8.5 x 3.3 x 9 inches, this balancer integrates seamlessly into standard small block Chevy installations without requiring additional modifications or clearance work.

This balancer suits marine engine builders, performance enthusiasts, and service technicians rebuilding or upgrading small block Chevy powerplants. Whether retrofitting an aging marine engine or assembling a new high-performance platform, SFI-certified balancers provide the assurance that your engine meets current safety and performance standards. The natural finish resists light corrosion in typical garage environments, though owners in saltwater settings should apply protective coating to extend service life. Verify crankshaft balance type and core diameter before installation to ensure proper fit and function.