Using this Perrin brass shifter bushing is straightforward. First, gather the tools you'll need from the box. It's estimated to take about 30 minutes to install, and you won't need any special tools. Just replace the original OEM rubber shifter bushing with the one from the box. When you shift gears, you'll notice a more precise feel. As for maintenance, it doesn't require much. Check the O - rings periodically to make sure they're in good condition. If you're using the included grease packet during installation, that should help with smooth operation. Be careful not to over - tighten any parts during installation to avoid damage. Overall, this bushing is designed to give you a better driving experience with your 2015 - 2025 Subaru WRX.