Take sleek to a new level – the ingenious RidgeLine Towers integrate with flush-mount factory side rails so you can build a real rack that carries more. Strong and versatile, they attach easily and have a sleek design that aligns with your vehicle’s aerodynamic attitude. Attaches a base rack system to vehicles with flush-mount factory side rails. RidgeClips and crossbars required for a complete system. Both are sold separately. Advanced design is strong and quiet and aligns with aerodynamic vehicle aesthetics.