What is this part under my dash


What is this broken tube under my dash, and do I need to replace it?

It is a heater duct tube. You will want to replace it so the warm air goes where it is supposed to.

sweet thank you
where would be a good place to buy one? WCCC?

That would be the easiest. Duct Hose - Heater - Cloth - Premium - 2 Foot Length - Repro ~ 1967 - 1970 Mercury Cougar / 1967 - 1970 Ford Mustang ( 1967 Mercury Cougar, 1968 Mercury Cougar, 1969 Mercury Cougar, 1970 Mercury Cougar, 1967 Ford Mustang, 1968 Ford Mustang, 1969 Ford Mustang, 1970 Ford Mustang ) at West Coast Classic Cougar :: The Definitive 1967 - 1973 Mercury Cougar Parts Source

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thanks

That is not a heater duct and the part that Royce posted is not what you need. The damaged part is actually a duct for the air conditioning and is a hard plastic piece. If you want to have cold air come out of the A/C vent beside the glovebox door then you will want to replace it. While you are in there you should probably also inspect the duct for the drivers side to see if it is going bad too.

Randy Goodling
CCOA #95

Randy:
You are spot on with your comment. My '72 droptop had the same malady from sitting out in the sun for 30 years (boneyard rescue). Don just about always has them, but are starting to become unobtanium. Keep in indoors or at least under a low carport.