Using this Perrin radiator bracket set is easy. First, remove the old, rusty factory brackets from your 2008 - 2021 Subaru WRX or STI. Then, take the included PERRIN radiator stays and use the M8 flat head socket screws to attach them in place. You can use the M5 short arm hex key for tightening. When installing, make sure the brackets are properly aligned to ensure a good fit. As for maintenance, keep the brackets clean. You can use a mild soap and water solution to wipe them down. Avoid using harsh chemicals that could damage the anodized finish. If you notice any signs of wear or damage over time, don't hesitate to contact us, as this set comes with a 5 - year warranty.