Oldsmobile 455 6.500" External SFI-Rated Damper Harmonic Balancer improving belt retention and reducing

improving belt retention and reducing the risk of slippage

Don't spend hours figuring out which pieces and parts you need to get what you want from your engine

By using an aggressive lobe profile

along with optimized winding

When building rear-ends for race cars or trucks

Oldsmobile 455 6.500" External SFI-Rated Damper Harmonic Balancer improving belt retention and reducingSpeedmaster 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.