FTP Introduces a 2 Piece Billet Pulley Set to replace the High Failure Rate OEM Pulleys 1132020419. The Double pulley set (Especially the Accessory Belt Pulley) Which is PLASTIC has been know to IMPLODE, leaving Belt carnage, Plastic and a Damaged engine compartment behind. These Pulleys are constructed of CNC Billet Aluminum and offer High speed ZZ Bearings. This is a great Preventative maintenance Modification, Or a MUST if you are upgrading your S/C or Crank Pulley.