GFB 13+ Subaru BRZ / 13+ Scion FR-S Lightweight Aluminum Water Pump Pulley

When you're looking to get a little more pep out of your 2013-2020 Subaru BRZ or Scion FR-S, reducing the rotating mass in the engine is a smart way to go. This lightweight aluminum water pump pulley from Go Fast Bits is designed to do just that, helping your engine feel more responsive and willing to rev.

The factory water pump pulley has a good amount of inertia, meaning your engine has to work harder just to get it spinning. By replacing it with this pulley, machined from a single billet of 6061-T6 aluminum, you can reduce that rotating inertia by up to 85%. This means more of the engine's torque can go directly to the wheels, giving you that sharper throttle response and a more lively feel, especially when you're climbing through the RPM range. It's a straightforward bolt-on part that doesn't require any other modifications or tuning to work effectively, and GFB has tested it to ensure it won't negatively impact your accessory performance.