The OEM Subaru crank pulley has been a cause for concern ever since its original design. It is extremely heavy, susceptible to catastrophic failure, and quite unsightly. Eliminating rotational mass while maintaining a safe presence can increase reliability and bring faster Rev's! GrimmSpeed really pulled out all of the stops for this Lightweight Crank Pulley. CNC machined from 6061 T6 Aluminum this pulley makes no compromise. It weighs in 3.5lbs lighter than OEM while at the same time increasing its durability. Marked with a timing mark and perfect cut keyway makes this install a breeze. This pulley was designed with the optimum weight for performance while avoiding misfire CEL's and engine hesitation.