Go Fast Bits Lightweight Crank Pulley Subaru WRX / STI / Legacy GT / Forester XT 2002-2021

Install a GFB non - underdrive lightweight under - drive pulley kit and experience amazing throttle response and extra power! GFB's pulleys are made from top - grade 6061 - T6 aluminium billet on advanced Multi - Axis CNC machines. They're much lighter than factory steel pulleys. This low weight cuts down the rotating inertia of the belt train, letting the engine speed up faster. It's like having a lightened flywheel, especially noticeable at low RPM before the turbo kicks in. At low RPM, a heavy pulley uses a big part of the available power, but with GFB's pulley, that's not a problem. Also, making the crank pulley smaller slows down the accessories and reduces the load, especially at high RPM, without affecting their normal operation. Part #: 2009. Fitment: 2002 - 2014 WRX, 2004 - 2019 STI, 2005 - 2009 Legacy GT, 2004 - 2013 Forester XT.

Using this Go Fast Bits lightweight crank pulley is straightforward. First, make sure your engine is turned off and cooled down. Remove the old pulley carefully and replace it with the new GFB pulley. Check that it's properly installed and tightened. When using the vehicle, you'll notice better throttle response right away. As for maintenance, it's a good idea to check the pulley regularly for any signs of wear or damage. If you notice any issues, replace it promptly. Also, keep it clean to ensure smooth operation. Avoid over - tightening the pulley during installation as it could cause damage. With proper use and care, this pulley will serve you well for a long time.