ATI Performance Products ATI918930 Super Damper Harmonic Balancer

The ATI Performance Products ATI918930 Super Damper Harmonic Balancer, also called a harmonic damper or crankshaft damper, mounts on the front of the engine crankshaft. Its job is to absorb and reduce torsional vibration from the crankshaft while the engine runs.

A harmonic balancer also gives the crank pulley and accessory drive a place to mount. This helps protect engine bearings and rotating parts from the stress of crankshaft vibration.