The Fluidampr Crank Pulley has been designed to provide your vehicle with optimum harmonic balancing, especially if you have increased your power output. These particular crank pulleys will reduce torsional vibration, or end-to-end twisting and rebound motion generated through each power stroke. The Fluidampr Crank Pulley will also contribute to better drive train and timing efficiency, which will lead to prolonged life of critical engine components such as your main bearings, oil pump, and crank shaft. Cars that are making more horsepower can break the factory crank pulley because the increased torsional vibration magnitude in the rubber OEM harmonic balancer. Eventually this will cause separation from the crank pulley, and no one will be having a good time. With the Fluidampr Crank Pulley, you can have a peace of mind knowing you have a quality part that can handle your increased power output, as well as future modifications that may occur. Add that extra insurance to your engine with a quality crank pulley.