This Slimline II rack kit contains all the components needed to mount the Slimline II cargo carrying rack to a Jeep JK 4 door 2007-2018 including the Slimline II Tray (1425mm x 2368mm), the Jeep Extreme Mounting System and a Wind Deflector. Drilling is required for installation. This rugged, sophisticated, high performance, nearly indestructible rack system allows you to quickly remove the Freedom Panels and works with the hardtop roof on or with no roof at all. 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* For further information on installation, please see the fitment instructions in the INSTALL tab. The JK Extreme mounting system bolts to the roll bar with middle and rear brackets. This unobtrusive, high performance, nearly indestructible mounting solution allows you to quickly remove the Freedom Panels and works with the hardtop or with no roof at all. Freedom Panels can be quickly and easily removed with rack in place. The cargo weight is evenly distributed across the roll bars and body of the jeep, placing zero weight on the hardtop itself.