Using this turbo is easy. First, make sure your Subaru WRX 2002 - 2007 or STI 2004+ is turned off and cooled down. Then, use the included gaskets and hardware kits to bolt the turbocharger in place. Connect the oil and water pipes as instructed. When starting your vehicle, let it idle for a few minutes to allow the turbo to lubricate properly. Be careful not to over - rev the engine right away. For maintenance, regularly check the oil level and the condition of the pipes. Replace the oil at the recommended intervals. If you notice any strange noises or a drop in performance, have the turbo checked by a professional.