Using this Perrin turbo inlet hose is a great way to enhance your Subaru's performance. First, follow the included installation instructions. Remember, you might have to take out the intake manifold during installation, so be careful with that step. It should take around 3 hours to install. Once it's installed, your car will enjoy better airflow and more power. As for maintenance, just check the hose regularly for any signs of wear or damage. Since it's made of high - quality silicone with stainless steel support, it should last a long time. But if you notice any issues, contact the manufacturer as it comes with a 5 - year warranty.