This 954mm/37.6'' long full-size Slimline II cargo roof rack kit contains the Slimline II Tray, Wind Deflector and 2 pairs of Rail Grip Feet to mount the Slimline II Tray to the roof rails of your Citroen C4. This system installs easily with 4x4 ready feet that grip onto the existing factory/OEM roof rails. No drilling required.