Using these Perrin intercooler pipes is a great way to boost your Subaru's performance. First, make sure you have both the core and the piping kit as they're sold separately. During installation, be prepared to remove your foglights and trim some plastic in the front bumper. You'll also need to replace the stock airbox with an aftermarket short - ram intake and move a hard fuel line, so if you're not an experienced mechanic, it might be best to get professional help. After installation, no tuning is required. For maintenance, check the hose clamps and couplers regularly to ensure they're still tightly connected. The powder - coated finish is durable, but avoid harsh chemicals that could damage it. If you have any issues, the 5 - year manufacturer warranty has you covered.