Recently I have noticed on my Chevrolet Aveo (2007) that air is leaking somewhere. Found that T join that hold hoses that return air form motor is bro...ken (like in image) and tried to find replacement part.
After few months of searching I decided to make part with 3d printing.
This model is close replica to original T joint.
Inner diameter: 3mm
Max outer diameter: 10.5mm
Part printed with 100% infill with PLA.
Printed horizontally for better strength
UPDATE: PLA gets soft on about 80 degrees and gets deformed. Suggest to make prints with ABS because of higher melting point.