Using this StopTech front brake kit is straightforward. First, make sure your vehicle is the 2004 Subaru STI, as this kit is specifically designed for it. When installing, simply replace your old brake pads, rotors, and brake lines with the components included in the kit. It's a direct replacement, so you don't need to make any major modifications. For normal use, you'll notice an immediate improvement in braking performance, with a firmer pedal and shorter stopping distances. When it comes to maintenance, check the brake pads regularly for wear. If you start to hear unusual noises or feel a change in the pedal feel, it might be time to inspect the pads. Also, keep an eye on the brake fluid level and make sure it's within the recommended range. In terms of storage, if you're not using the kit right away, store it in a dry place to prevent rust and damage. And always follow the vehicle manufacturer's safety guidelines when working on your brakes.