Using the GrimmSpeed Stage 1 Power Package is quite straightforward. First, make sure your 2008 - 2014 Subaru WRX is parked in a safe and well - ventilated area. You can start by installing the 3 - Port Electronic Boost Control Solenoid. It's designed to be plug - and - play into the OEM harness, so you don't have to worry about splicing wires. Next, install the Cold Air Intake System. This will help reduce pre - turbo restriction and make your turbo build boost faster. And don't forget to put on the license plate frames. Remember, all GrimmSpeed Staged Power Packages require a proper tune. So, after installation, take your car to a professional tuner. For maintenance, regularly check the custom reusable high - flow air filter. You can clean it and reuse it. Keep an eye on the connections of the boost control solenoid and intake system to make sure they're secure. If you have any questions during installation or maintenance, refer to our written and video guides.