Using this D2 Racing RS Coilover Kit for your 2008 - 2013 Subaru Forester is straightforward. First, make sure your vehicle is on a flat and stable surface. You can adjust the height and preload according to your driving needs. When adjusting, do it gradually and test the ride after each adjustment. As for the dampener and rebound, start with the default settings and then fine - tune them based on your driving style. Keep in mind that on most applications, you have the option of pillowball upper mounts or top mounts. Make sure to check the mounts regularly for any signs of wear. To keep your coilover kit in good condition, clean it regularly to remove dirt and debris. The Teflon - coated threads are resistant to rust, but if you live in a wet area, you may want to apply some additional anti - rust protection. And remember, this kit is rebuildable and serviceable in the US, so if you encounter any major issues, you can get it fixed.