Fluidampr Steel Internal Harmonic Balancer Pulley (91-98 Evo)

Steel Internal Harmonic Balancer Pulley You can't feel them or hear them, but harmonic vibrations are at work inside EVERY internal combustion engine. That's not good. Similar to glass-shattering forces created by a high pitched note, harmonic vibrations cause metal fatigue and can cause significant power loss because crankshaft harmonics are transmitted to the camshaft and valvetrain. Control this power-robbing force with a Fluidampr harmonic damper that uses race proven vibration damping technology. A high viscosity silicone fluid surrounds a nylon-coated inertia ring inside a laser welded housing. All dampers are coated with a black zinc chromate finish for increased corrosion resistance. Features Bore Diameter 1.7328" Degree Marking Range 2 timing marks 180 degrees apart Degree Markings Engraved Engine Balance Internal Finish Black Zinc Keyway Not Applicable Length 1.807" Material Steel Mounting Hardware Included No Outside Diameter 6-3/8" Safety Rating SFI 18.1 Weight / Rotating Weight 7.7 lbs / 5.1 lbs Benefits Reduce wear on the main bearings and timing gear Achieve more accurate valvetrain operation Lower the risk of crank failure Applications 1991-1998 1G / 2G DSM What's In The Box? (1) Harmonic Balancer References Installation Manual Additional Instructions Warranty Manufacturer One Year Warranty