Using this Rally Innovations front lip splitter is straightforward. First, make sure your car is parked on a flat surface and the engine is off. Then, simply bolt the splitter onto the front of your Subaru WRX 2018+ or STI 2015 - 2017 following the provided instructions. When it comes to delivery, remember that a signature will be required. For maintenance, clean the splitter regularly with a mild soap and water solution. Avoid using abrasive cleaners as they can damage the powder - coated finish. If you notice any scratches or chips, it's a good idea to touch them up to prevent further abrasion. This way, your front lip splitter will keep looking great and performing well for a long time.