This viscous damper controls torsional vibration on Subaru EJ engines that have been modified beyond stock tolerances, protecting the crankshaft and accessory drive from the wear a stock balancer cannot handle.

Fluidampr 531101 Features:

• Internal balance for Subaru EJ series engines
• 5-3/8 in. outside diameter
• Serpentine pulley, 4 rear / 5 front grooves
• SFI 18.1 certified steel construction
• Black zinc chromate finish with engraved timing marks
• No maintenance required, made in USA