This Is an oil cooler guard that is meant to fit on all Harley Davidson M8 Softails. The pattern in the guard are small bar and shield HD logos. I have tested the design on my personal 22 low rider ST and it fits with no issues. You will just need to remove the one bolt in the bottom of the the frame that goes around the oil cooler and slip this in between then replace the bolt. The cooler itself has rails on the sides that allow it to fit with the frame clamped on it to keep that guard in place (The rails will face out towards the front wheel when installing). I recommend using at least PETG so it will hold up to a bit of heat.

I loosely based this design off this file I found on Thingiverse. I needed to modify the blank to be able to remove material from just the middle.

I've included the STL files for the frame and blank to make your own mesh designs if you would like to remix it. You will need to attach the middle to the frame in your CAD software after you've made a design in the blank. That way it is one STL file when you are done and prints in one piece.