Using these Noble Carbon Fiber or Carbon Kevlar Hood Struts is a breeze. First, make sure your Subaru is the 2015 - 2021 WRX or STI model as they are designed specifically for these cars. For installation, it's a simple bolt - on process. Just pop off the old struts and pop on these new ones. When you're installing, remember to place the Carbon Fiber part towards the top. As for maintenance, you don't need to do much. Just keep them clean from dirt and debris. Avoid using them with Carbon Fiber Hoods as it's not recommended. Enjoy the ease of opening your hood and showing off your vehicle with these stylish and functional struts.