Project IJ Front & Rear Bumpers + Front Shock Towers

STL Fabrication Package

3D-Printable Fixtures and Templates for Steel Fabrication

This product includes the 3D-printable jigs, fixtures, and templates required to fabricate the Project IJ front bumper, rear bumper, and front shock towers using laser-cut steel parts.
These files are part of the Project IJ fabrication system and are intended for builders who want to weld real steel components, not bolt on printed parts.

What’s Included

• STL files for:

  • Front bumper welding fixtures

  • Rear bumper welding fixtures

  • Front shock tower alignment and welding jigs

  • Bend and placement templates where required

• Left/right and front/rear–specific fixtures as needed

What You’ll Need

To complete the final steel parts, you must also have:

• Laser-cut steel parts from SendCutSend
  👉 [Link to SendCutSend steel parts – coming soon]

• Steel tube or rod (3/16” tubing for everything but lower cross bars in shock towers)

• Welding equipment and basic fabrication tools

• HD Tube Bender — highly recommended

  • https://harleydesigns.com/store/hd-bender-for-316-tubing

  • https://marketplace.sendcutsend.com/p/CW90C291/hd-bender-for-3-16-tubing

The bend templates and geometry were designed around the HD Tube Bender.
Using it will produce the best fit, symmetry, and repeatability.

How These Files Are Used

1. Print the fixtures from this STL package.

2. Bend tubing using the provided templates and the HD Tube Bender.

3. Place laser-cut plates and tubing into the printed jigs.

4. Tack-weld, then verify alignment

5. Remove from jigs

6. Clean up and finish weld

Important Notes

• This product includes digital STL files only. No physical parts are shipped.

• Laser-cut steel parts are not included and must be purchased separately from SendCutSend.

• Welding is required to produce the final bumpers and shock towers.

• Designed exclusively for Harley Designs’ Project IJ.

• All designs © Harley Designs Inc.

These files are provided under a Creative Commons license for personal, non-commercial use only. Commercial reproduction, manufacturing, or resale of the cage or its components—either as-is or modified—is strictly prohibited.

Disclaimer

• Laser cut parts will only be offered from SendCutSend (and Brazin Scale for international customers where SendCutSend does not ship to) . I will not distribute the laser cut files to have them cut yourself. Make sure that you are able to purchase the parts from SendCutSend or you will need to contact brazin scale through their website: https://www.brazinscalerc.com/

• Not everyone is capable of the tasks required to finish this project, however there are no refunds on the service.

• I can share my methods but I can’t be sure your equipment will react the same as mine

• There is a facebook group created for these projects, there are many good resources in there of people who have completed the project. https://www.facebook.com/groups/harleydesigns

• Digital files sold have a non-commercial, personal use only license. You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used in any way whatsoever in which you charge money, collect fees, or receive any form of remuneration.