Good used heater core. Removed from 2005 F550. Will fit alot of heavy duty Ford truck in the mid 2000's. Here is a part number to check fitment SPECTRA-99300
Excursion 2WD
Excursion 4WD
F-650 XL
F-650 XLT
F-650
F-750 XL
F-750 XLT
F-750
F250 Super Duty P/U 2WD
F250 Super Duty P/U 4WD
F350 Super Duty P/U 2WD
F350 Super Duty P/U 4WD
F450 Super Duty P/U 2WD
F450 Super Duty P/U 4WD
F53
F550 Super Duty P/U 2WD
F550 Super Duty P/U 4WD