Oldsmobile 455 6.500" External SFI-Rated Damper Harmonic Balancer They feature larger radius stud

They feature larger radius stud fillets for extra strength

Nothing lasts forever

Tthese Speedmaster aluminum water pump pulleys

These kits help to eliminate any noise or unnecessary grinding that may cause your starter to prematurely wear

and use low-resistance terminals for maximum conductivity

Oldsmobile 455 6.500" External SFI-Rated Damper Harmonic Balancer They feature larger radius studSpeedmaster 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.