Chevy SBC 350 6.250" Internal SFI-Rated Fluid Damper Harmonic Balancer They're available in several sizes

They're available in several sizes to fit your valve covers

ensure optimal performance and reliability

but they also lengthen valvetrain component life and reduce wear and tear on valve stem tips

Specialized high temperature epoxy resists shock and vibration

Speedmaster electric fuel pumps feature an improved design for street and strip applications

Chevy SBC 350 6.250" Internal SFI-Rated Fluid Damper Harmonic Balancer They're available in several sizesSpeedmaster harmonic balancers are crafted from high quality steel and feature a tuned elastomer for optimal engine performance. They include a strong bonding process, easy to read timing marks, and an advanced design to absorb engine vibrations, extending the life of the crankshaft and bearings for enhanced power and torque.