Wondering how to tell which rotor is which? If you’ve got new PowerStop Drilled & Slotted Rotors, it's important to be able to tell the difference between the left and right rotor - you’ll want to install them on the correct side. Installing the rotor correctly will allow for proper airflow, which leads to maximum cooling and long-term brake system performance. For PowerStop Drilled & Slotted Rotors, we provide a sticker on the hat of the rotor indicating which side it should be installed on. Bu