DIESEL PERFORMANCE COLD AIR INTAKE KITSIncrease vehicle's performance level Include 1406 CFM high-flow filters, cool air dams for added clean air flow Specially designed intake tube positions filter correctly For Ford Super-Duty diesel enginesThese intake kits include a High-Flow Filter that is protected from engine heat by a heat-resistant, x-linked polyethylene box. Topped with Cool Air Dams for added clean air flow. Kits also contain a specially designed intake tube that helps for an effective filtering of incoming air.