The ROUSH Vent Gauge Pod is for the genuine performance driver who desires to know what is going on with their vehicle every time. Normally, having additional information regarding your vehicles performance requires the installation of supplementary gauges. However, adding an additional gauges usually increases clutter and lessens visibility around the dashboard, and generally call for some form of cutting or drilling into your vehicle. The new ROUSH Vent Gauge Pod is cleverly designed to integrate in the Heating, Ventilation and Air Conditioning (HVAC) vents of all 2011-2014 Mustangs. The ROUSH Vent Gauge Pod will obstruct the air through the system can rest assured that there is no significant loss of air flow for the cooling and heating functions of either the Mustang or F-150.The ROUSH Vent Pod Gauge will fit any standard 2-1/16 inch gauge (not included). The unit is low profile and designed to match the interior of the vehicle.