Fluidampr Ford 6.0L Powerstroke 8in Duel Belt 5 and 7 Rib Pulley For Alternator

Description

The outer housing mounts to the crankshaft. When combustion triggers rapid twisting and rebounding (torsional vibration), the outer housing and inner inertia ring will move in-and-out of phase with each other. The motion of the inner inertia ring through the silicone creates shear. Shear eliminates unwanted vibration.