This kit creates a full size rack that sits above your Rivian R1T truck bed. This Slimline II cargo carrying rack kit contains the Slimline II tray (1345mm x 1358mm), 2 Tracks, and 6 Pickup Truck Bed vehicle specific Legs that fit into the Tracks. All Front Runner Rack Kits contain installation instructions as well as all the components needed to mount the Slimline II Tray to your vehicle. All Front Runner Racks are backed by a Limited Lifetime Warranty* No drilling is required for installation.