I replaced my entire duct system with heaver aluminum flex pipe, the trouble with using wireflex is that it takes up much more space because of the two inches of diameter for a given pipe size. I did use KD pipe where the Mfg had crushed the aluminum flex I just squeezed the KD to a oval. I also added dampers for even heating through the rig. Its a little work but in my case it was worth it JMHO
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Retired Navy
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho
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