Circuit Werks latest 2013-UP Scion FR-S & Subaru BRZ CNC T-6061 Light Weight Aluminum complete pulley kits. 4.86 HP GAIN, Dyno proven on a stock FRS! This listing is for the Silver Machined finished pulleys only.
Each pulley kit consisted of 3 pulleys which are: Alternator (0.22 lbs), Water Pump (0.55 lbs), & Main Crank pulley (0.82 lbs). Parasitic drag decreases performance. By reducing the overall weight of just 4+ pounds your FRS/BRZ will rev so much faster and therefore gain HP. All 3 pulleys are the same diameter as stock and we were able to shave over 4+ pounds with the lightweight high-grade T-6061 aircraft aluminum. Will fit all FRS/BRZ including Auto & Manual.