The Blue Bird All American FE D3 2010 Through 2016 Winterfronts are a practical solution for colder climates. Available in yellow, these winterfronts are recommended for use when the air temperature consistently drops below 40 degrees Fahrenheit. Each winterfront is sold individually and fits most Blue Bird All American D3 Series from 2010 through 2016. Please note that drilling is required for installation. Stay prepared and protect your vehicle with these reliable winterfronts.