This is an original equipment manufacturer (OEM) ignition coil for Subaru WRX models from 2015 to 2021. It's sold individually, and the price is for each coil. The specific Subaru part number is 22433AA700. Note that Subaru of America only warrants parts installed by a certified Subaru dealership, and the part must match the vehicle VIN.

Using this ignition coil is straightforward. First, make sure your vehicle is turned off. Locate the old ignition coil and carefully remove it. Then, install the new coil in its place. When installing, ensure it's firmly in position. As for maintenance, it generally doesn't need much, but it's a good idea to check it during regular vehicle servicing. Remember, Subaru of America only gives a warranty if the part is installed by a certified Subaru dealership and matches your vehicle's VIN. So, it's best to get it installed by a professional if you want the warranty.