Part of Yakima's truly innovative StreamLine (TM) roof rack system, the CoreBar combines strength and aerodynamic air flow in a quiet, cost-effective package. It's the first aerodynamic steel crossbar that combines the strength and utility of steel with a unique JetFlow (TM) teardrop shape that minimizes wind noise and maximizes fuel economy potential. Galvanized steel is roll-formed and vinyl-wrapped to provide durability and corrosion resistance. The sleek new aero profile fully fits with modern vehicle shapes. Includes CoreBar SL Adapter to integrate with all StreamLine System Towers. Bar has durable nylon Yakima-branded end caps for a sleek, finished look.