As the title says, this is a vacuum adapter for walnut blasting the intake port of your N54/N55-equipped BMW. If you're wondering what that is, here's a
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procedure: http://www.e90post.com/forums/showthread.php?t=682116
You don't have to have the media blaster mentioned in the post--you can modify any cheap sandblaster to work: http://www.bimmerforums.com/forum/showthread.php?1881774-DIY-N54-Intake-Valve-Walnut-Blasting
It seems obvious that this would be a shoo-in for a 3D printed part, but I looked all over for a 3D print file for this application and could find none, so I made my own!
I have not used it yet, but I did make one. I plan on using it this weekend (9/24/16). The outlet is sized for a 1 1/4" shop-vac hose, and the hole is sized for 1/8" black pipe, but I can change the diameters easily. Just send me an email and I can post a new part file with your desired diameter.
Also, if you want me to print one for you, just send me an email and we can work something out!
Because this is a tool and you will likely be yanking and pulling on it, I would suggest printing at 100% infill. The walls are only 1/8" thick, so it won't use that much material. Also, print it with the round outlet on the build plate as shown in the first actual pic, not with the oval down as shown in the blue print file pic.
