Exhaust Header/Manifold Fabrication System

I am working on designing a new exhaust manifold for my Volvo 940 turbo, and I remembered seeing a tube snap-on plastic fabrication system from a company.

Searched for a 3D printed version and found don-f design over at thingiverse;
https://www.thingiverse.com/thing:4886707/files

So I decided to give the design a shot, and modeled something similar in Fusion 360 from the ground up. Using the metric measuring system, but it can easily be converted into imperial in Fusion 360.
The bent tube is based on as cut material, readily available to purchase from steel raw material factories around my parts. It's also a ⅓ of the length, to allow easier stepping up in bend length, as well as making it easier to print without supports and bad overhangs

I applied Modify Parameters into each design, for a quick and easy alteration to the models. Based on the need.
 

Current models available;
- Adjustable Bend tube
- Adjustable Straight tube
- Flange clamping tube mount, for Volvo B23/B230 Cylinderhead
- B230 Exhaust Flange
The bend can be altered as well as the diameter and length for both models.


These are my recommended settings for print strength;
Material: Basically anything, Flange clamp should be in PETG or similar, not PLA, too stiff.
Walls: 1 (Or 2 if yours snaps of easily)
Top/Bottom: 2
Infill: 15% Gyroid
Support: No support should be needed
Wall Generator: Arachne (Nozzle size has a wider wall thickness range)
Alternate extra wall (Stronger wall to infill bond)
Walls Printing Order: Inner/Outer/Inner (A quality boost in walls visual and mechanical accuracy)
Seam: Scarf Joint Contour & Hole (In theory should proved with a stronger seam, better accuracy) 


Initial Release - 2025-05-08;
Not yet tested, will print it and update if needed.

Follow up, test printed - 2025-05-08;
Works as is, and creates a very rigid locking between parts. Might need to decrease the diameter of the hook parts. So it comes apart easier though.

Follow up #2, new models uploaded - 2025-05-08;
Works as is, and creates a very rigid locking between parts.