Using this exhaust cover is a breeze. First, make sure your Subaru WRX is from 2022 to 2025 and that you've upgraded to a single exit exhaust. Locate the exposed hole on the right - hand side of the OEM rear bumper (USDM passenger side). Take the cover and place it over the hole. You don't need to drill any holes for installation, just position it properly and it should fit snugly. As for maintenance, keep it clean by washing it with mild soap and water regularly. Avoid using abrasive cleaners as they can damage the ABS material. If you notice any signs of damage or defect within the 1 - year warranty period, contact the manufacturer for assistance.