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 off-road tough feet that grip onto the existing factory/OEM roof rails. No drilling required.