Introducing Billet Duralumin Pulley Kits for the Scion FR-S, Subaru BRZ, and Toyota 86. This is a two Pulley set which includes an alternator pulley and water pump pulley for your engine. These pulleys are constructed from Duralumin, which is a durable but lightweight alloy comprised mainly of aluminum and copper. They are then anodized blue for corrosion resistance and a stylish look before adding the signature GReddy logos.