USED FRONT DEFROSTER DUCT – 1961–65 CORVAIR TRUCKS & VANS Correct factory-style front defroster duct for 1961–65 Corvair FC models, including Rampside, Loadside, and Greenbrier. Designed to mount beneath the front of the vehicle and channel through the center of the front floorboard, delivering warm airflow to the cabin. Ideal for restoration or replacement in original heater-equipped setups.