Round Heater Inlet Duct Hose. This is the 4" round hose that goes from the air inlet duct to the heater blower housing. Original style black cloth covering. The Ford part number was B5A-18584-A. Fits: 1955-1957 Thunderbird.
TBI DY250 - A/C and Heater Duct Hose Y for 2 1/2" Hose
SQUARE HEATER DUCT HOSE FOR 1955-57 THUNDERBIRD & 1952-1956 FORD & MERCURY CARS
2-1/2" x 72" Plastic Defroster and Heater Duct Hose
TBI FHR2-2.5 - A/C and Heater Duct Hose Adapter - 2" to 2.5"
Round Dual Vane Louver, Chrome, for 2" Duct Hose [32-13]
Round Dual Vane Louver, Chrome, for 2-1/2" Duct Hose [32-13X]