You can find these “elbow” pipes  in the front of your engine (in driving direction ) between your heat exchanger and the heater control flap (that is connected with a cable to your dash control levers). Good condition of these elbows is mandatory to make your heater system work as it should be. We’re happy we have found those parts now and added to our ever-growing program to keep your Volkswagen on the road! Sold per pair with a perfect fit on all of your aircooled Type 4 engines in your Bay window or T25/T3 vanagon bus!