This Perrin Performance crank pulley is a perfect fit for multiple Subaru models, including the 2002 - 2014 WRX, 2004 - 2021 STI, 2005 - 2009 Legacy GT, 2005 - 2009 Outback XT, and 2004 - 2013 Forester XT. It's crafted from CNC 6061T6 billet aluminum and anodized in your choice of black, blue, or red. With a weight of just 1.2 lbs, it's over 4 lbs lighter than the stock pulley, which is equivalent to removing over 100 lbs of vehicle weight. This reduction in rotating mass boosts horsepower, torque, and throttle response. Installation is easy and takes only about 30 minutes, no tuning required. It comes with an installation guide and a 5 - year manufacturer warranty. Unlike aftermarket underdrive pulleys, it won't cause charging or drivability issues, and it won't wear out engine bearings or the oil pump. There's no extra vibration or noise, and you can install it without jacking the vehicle or removing much more than the belt cover, belts, and stock crank pulley.
Using this Perrin crank pulley is simple. First, make sure your vehicle is turned off and cooled down. Remove the belt cover, belts, and the stock crank pulley. Then, install the Perrin pulley in place of the stock one. You don't need to jack up the vehicle, and it should take about 30 minutes. No tuning is required after installation. As for maintenance, there's not much to worry about. Just keep an eye on it during regular vehicle check - ups. If you notice any abnormal noises or vibrations, it's a good idea to have it inspected. Remember, this pulley comes with a 5 - year manufacturer warranty, so if there are any problems during this period, you can reach out to the manufacturer for help.
