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

Upgrade your Subaru with a GFB Non - underdrive lightweight under - drive pulley kit and experience a significant boost in throttle response and power! Here's how it works. First, it's all about the weight. GFB's pulleys are crafted on state - of - the - art Multi - Axis CNC machines from top - grade 6061 - T6 aluminium billet. They're incredibly lighter than the factory steel pulleys. This reduced weight cuts down the rotating inertia of the belt train, enabling the engine to speed up quicker. It's like having a lightened flywheel, and you'll really notice the difference at lower RPMs before the turbo kicks in. That's because at low RPM, a heavy pulley eats up a large chunk of the available power. Second, the under - driving feature. By making the crank pulley smaller, it slows down the accessories and reduces the driven load, especially at high RPM, without messing up their normal operation. Part #: 2009. Fitment includes 2002 - 2014 WRX, 2004 - 2019 STI, 2005 - 2009 Legacy GT, and 2004 - 2013 Forester XT.

Using this Go Fast Bits crank pulley is straightforward. First, make sure your Subaru's engine is cool and the battery is disconnected. Remove the old pulley carefully following your car's repair manual. Then, install the new GFB pulley in its place. Make sure it's properly aligned and tightened according to the recommended torque. When it comes to maintenance, regularly check the pulley for any signs of wear or damage. Keep it clean to prevent dirt and debris from affecting its performance. If you notice any unusual noises or vibrations, it's a good idea to have it inspected. And remember, always follow the manufacturer's guidelines for any additional care.