Fluidampr - Harmonic Damper Underdrive 35% (Alternator Only) - Honda - B SeriesSpecifications: Manufacturer: Fluidampr Reference Number: 620601 Fluidampr Engine Dampers are designed to control destructive vibrations which are transfered thru the crankshaft. Each time the air fuel mixture inside a cylinder is ignited, the combustion that occurs creates a torque spike that is applied to the crankshaft through the piston and rod. This torque spike is so severe that it not only turns the crankshaft, it actually twists the crankshaft