3in Boost Leak Tester

Here is my 3D printable Boost Leak Tester that I made to work with my Takeda Turbo Inlet hose on my Veloster N. The main body measures 3in in diameter.
 

I couldn’t find anything off the shelf at the hardware store that was the right size so I 3D printed one and because I could, I made it fancy with the N logo.
I used this model to find a leak on the hose after the intercooler to the throttle body on my 2021 Hyundai Veloster N. A quick adjustment and tightening of the clamp and leak fixed!
 

You will need a pressure gauge. It will simply hand thread into the main body. This is the one I used:
https://www.amazon.com/dp/B0C2XB9VZL?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1

You also will need a tire air valve. The hole for is 5/16" and the valve is held in place with a rubber seal and nut on the back side. This is the one I used:
https://www.amazon.com/dp/B01N4R99EQ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2
 

NOTE: The .stl file provided has been adjusted from the model/tool I used. I have shorten the main body by an inch as I found in practice that it was too long and there was no need for it to be as long. Also note, I have moved the tire air valve hole in further than the tool pictured so you can get the rubber seal and nut on the back side without interference with the inside wall. (I ran into this issue with my model but instead of making a new one, I just plugged the hole and re-drilled another. You will NOT need to do the same.)
 

CAUTION: Compressed air can be dangerous. Make and use this at your own risk. I am not responsible if you run too much pressure, the tool explodes and you loose a finger, a hand, a eye, a loved and cherished old grandmother that only wanted to see her grandson/granddaughter do something better with their live than play with cars.

I printed my tool with ESun PLA+ but I recommend that it be printed with ABS or a stronger material. I only had to run my tool at 10psi to find a leak.
 

I printed mine at a .3mm layer height with 6 walls and 3mm top/bottom layers with 15% infill.