910 Freeport Parkway, Suite 100 Coppell, TX 75019
+ (877) 342-5526

Model Specific Air Conditioning
1930's to 1980's Cars & Trucks
Since 1977

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Replacement Aftermarket A/C Defrost Duct for Chevelle Years 1970, 1971, 1972

Chevelle Aftermarket Replacement AC Defrost DuctWalls Are Twice as Thick as Original GM Part# 3963756

Question: What do you get when you mix thin gauge plastic with radical temperature shifts from hot to cold and back again? Answer: Warping and cracking!

In the auto restoration industry, there has been a history of scrapping OEM air conditioning ductwork in vintage ’70-’72 Chevelle, Monte Carlo and El Camino models because the duct had snapped off flimsy mounts, or developed cracks. So our engineers decided to develop our own replacement duct and while we were at it, figured we could address the hot/cold warping issue head-on.