ATI super damper pulley is the only harmonic dampened aftermarket main pulley designed for the DOHC KA24DE motor: Eliminates torsional crankshaft vibrations Exceeds SFI 18.1 specs Better engine performance and reliability Laser engraved 360?timing marks Black zinc chromate finished ATI Crank Pulley is build to order, normal lead-time is 2-3 weeks!