Using the StopTech Sport Axle Pack Slotted Front and Rear Brake Kit for your 2002 Subaru WRX is quite straightforward. First, make sure to check the pad fitment as described in the fitment information section. If everything fits, you can directly replace your old brake pads with the ones included in the kit. The slotted rotors and stainless - steel brake lines are also easy to install. For normal driving, you'll immediately notice an improvement in brake pedal feel and stopping distance. When it comes to maintenance, keep an eye on the wear of the brake pads and rotors. Since the brake pads have a low - noise and low - dust formula, they'll last longer, but still, check them regularly. If you notice any unusual noises or a decrease in braking performance, it's a good idea to have the brakes inspected. Also, remember that this kit is designed for performance street driving and light - duty track use. Avoid using it in extremely harsh or heavy - duty racing conditions to ensure its longevity.