Combining modern aerodynamics with old-school muscle, the new CoreBar is the first aero bar built with roll-formed steel’s strength, utility and durability. The JetFlow design is wind-tunnel tested to reduce drag for less wind noise and better fuel economy, and the galvanized steel delivers proven load-bearing performance. - Wind tunnel tested JetFlow teardrop shape is strong, quiet and exceptionally aerodynamic - Roll-formed galvanized steel holds the load - Sleek aerodynamic design looks awesome on your car’s roof - Vinyl wrapped for durability and corrosion resistance - Includes CoreBar SL Adapter to integrate with all StreamLine System Towers - Available in 4 sizes: SM (50”),MD (60”), LG (70”) and XL (80”)