I tried to improve the airflow into my Volvo 850 air filter housing by removing the flaps from the hot air intake. when I got my Ender 3 I knew there was more to do, so I designed this part. As you can see, I tried to increase every radius as much as possible to improve flow. Obviously the part fits exactly like the original, so no further modification is required.
You should print the model like it is shown in the picture. Supports are not needed.
I printed mine from PETG and its still going strong, despite the high temperatures this summer.
Have fun with it and tell me what you think about it.
The author hasn't provided the model origin yet.