To install Thule Aero extended follow the steps below- 1. First, make sure you have both a track bar (round silver bars on each side of your vehicle) and crossbars. 2. Next, place your track bars onto your mounts using a ratchet wrench. 3. Once they are in place, use an Allen wrench to secure them by screwing in a bolt into each end of your track bar. 4. Now that your track bars are secured, it's time to install your crossbars. 5. Start by placing them over your tracks and then slide down until they click into place. Now that all of your components are installed, it's time to take everything for a test drive! You can do so with or without cargo. It is up to you.