Using this Billetworkz oil cap is a breeze. Simply remove your old oil cap and replace it with this new one. It's designed to fit perfectly on your Subaru WRX, STI, or BRZ. When choosing a color, think about how it will look in your engine bay. As for maintenance, a gentle wipe with a clean cloth every now and then will keep it looking great. Avoid using harsh chemicals as they may damage the anodized or powdercoated finish. Also, make sure to tighten the cap properly to prevent any oil leaks.