Using this HT Autos Bottom Line Kit is a great way to enhance your Subaru WRX or STI Hatchback. First, gather all the parts from the box - you've got the front splitter, side skirt extensions, and rear lips. Before installation, make sure your car is clean. It's really important to get a professional to install the kit because some modifications might be necessary. Once it's installed, enjoy the new look of your car. To keep it in good condition, wash it regularly with a mild car - wash soap. Avoid harsh chemicals as they can damage the unpainted black finish. If you notice any small dents or scratches, don't worry too much as the polyurethane material has some flexibility. But if it gets seriously damaged, it's best to contact HT Autos Subaru UK for advice.