Using these RDX injector plug 'N play clips is a breeze. First, make sure your vehicle is turned off and the engine is cool. Locate the area where the injectors are installed in your 2012 - 2015 9th Gen Civic Si. Take the set of 4 plugs from the kit and simply plug them into the appropriate places. There's no need for soldering or crimping, so it's a quick and easy installation. When handling the clips, be gentle to avoid any damage. As for maintenance, there's not much to do. Just keep them clean and free from dirt or debris. If you notice any signs of wear or damage, it's a good idea to replace them right away to ensure your injectors work properly.