PB12306 Harmonic Damper w/ Hub, SFI certified

SFI Certified One-Piece Harmonic Vibration Damper for 472 / 500 / 425 / 368 Cadillac engines.

This damper assembly replaces the factory crank hub, and provides far superior vibration damping compared to the factory damper. The pulley mounting surface has the same spacing as the factory crank hub, so pulley alignment remains the same as a pulley bolted to the factory hub without a factory damper in between (stock ’73-newer non-damper pullies and all aftermarket pulleys). ’74-older factory crank pullies intended to be used with a factory damper require a spacer for proper alignment.

Sometimes referred to as a dampener or balancer – although Cadillac engines are internally balanced, so this part is not a balancer, and is not required for balancing your rotating assembly.