Found a Cheap/Affordable Solution to replacing the Defrost Duct (s)

I spent most of Saturday morning trying to find a 2.5" ID hose to replace the defrost Duct's in my wife's 75 Duster (I just went thru this with my 74 Ramcharger and wasn't happy with the flex duct I had purchased from McMaster-Carr for that. I found lots of threads here and on other mopar forums and wasn't super thrilled with what I came across as it all appeared more difficult than it needed to be.

I came across this on Amazon ( https://www.amazon.com/gp/product/B01N0RH9PH/?tag=fabo03-20 ) and would like to report back with great success that an 11.99 solution worked fantastic. It's rigid, so it supports itself nicely.

The ONLY thing I had to do was to take the clips off the vents that are on the dash and HVAC box so that it would slide over them, it's a TIGHT fit so no hardware required.

The downside is that this stuff is fairly frustrating to work with as it has rigid plastic so that it's form-able and once you get it on either the HVAC Box side or the vent side, it can easily become a strugglefest trying to get it slid over both sides without it coming off of the other.

The EASIEST way to install it, would be if the windshield was out, you could run it thru the vent holes in the dash, attach it to the HVAC outlets, then attach the dash vents and merely press and secure them into place. I probably went about it the hardest way.

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Doesn't the heater box end take 2 different size hoses, but the vents in the dash are the same size? How did you get past that? Or am I missing it.