cruiser
Well-Known Member
Hi Guys/Gals:
I'm going to replace the left defroster duct in my non-a/c 1974 Duster. I measured the defroster outlet on the heater box, and the left outlet (that goes up to the dash) is 2 1/4" outside diameter. The right outlet on the heater box appears to be smaller, but I don't need to replace that one. I'm not sure what the outside diameter of the vent in the dash (the one with the metal fastening clips on it) is. So what size flexible duct do I need? Is the dash vent also 2 1/4" outside diameter? I can't get a tape measure up there to measure it. A lot of places will sell you 2 1/2" flexible duct, but I'm not sure if this is the right size, or if there's an adapter that I need to put on the heater box defroster tube outlet to make this work. Ideas, anyone? Thanks.
I'm going to replace the left defroster duct in my non-a/c 1974 Duster. I measured the defroster outlet on the heater box, and the left outlet (that goes up to the dash) is 2 1/4" outside diameter. The right outlet on the heater box appears to be smaller, but I don't need to replace that one. I'm not sure what the outside diameter of the vent in the dash (the one with the metal fastening clips on it) is. So what size flexible duct do I need? Is the dash vent also 2 1/4" outside diameter? I can't get a tape measure up there to measure it. A lot of places will sell you 2 1/2" flexible duct, but I'm not sure if this is the right size, or if there's an adapter that I need to put on the heater box defroster tube outlet to make this work. Ideas, anyone? Thanks.
