This Perrin Performance crank pulley is a great upgrade for your Subaru. It fits 2002 - 2014 Subaru WRX, 2004 - 2021 Subaru STI, 2005 - 2009 Subaru Legacy GT, 2005 - 2009 Subaru Outback XT, and 2004 - 2013 Subaru Forester XT. Made from CNC 6061T6 billet aluminum, it's anodized in black, blue, or red. This pulley reduces rotating mass, giving you more horsepower, torque, and better throttle response. It weighs only 1.2 lbs, over 4 lbs lighter than the stock pulley, which is like removing over 100 lbs from your vehicle. No tuning is required, and installation takes about 30 minutes. It comes with an installation guide and a 5 - year manufacturer warranty. Unlike aftermarket underdrive pulleys, it avoids charging and drivability issues by copying the OEM design. It won't wear out engine bearings or the oil pump, and there's no extra vibration or noise. Installation is easy, just remove the belt cover, belts, and stock pulley without jacking up the vehicle.
Using this Perrin crank pulley is straightforward. First, make sure your vehicle is turned off and cooled down. Remove the belt cover, belts, and the stock crank pulley. Then, install the new Perrin pulley in place of the old one. It's a simple swap that should take about 30 minutes. There's no need to tune your engine after installation. As for maintenance, it doesn't require any special attention. Just keep an eye on it during regular vehicle check - ups. If you notice any unusual noise or vibration, have it inspected. Remember, this pulley has a 5 - year manufacturer warranty, so if there are any issues within that time, contact the manufacturer.
