Wind Diffuser technology disturbs airflow to reduce noise and drag for improved fuel economy Smart Slide, slid able length scale doubles as an under-bar aerodynamic cover, providing quick, no-hassle rack installation Trail Edge design reduces aerodynamic drag by allowing clean air separation from bar Swing Blade end cap pivots open to allow easy access to the T-track for easy installation of accessories Upper T-track with Quick Access interface allows smooth installation and removal of accessories Please check the Thule Buyer’s Guide (link below) to find the fit for your specific vehicle