This is a bracket for mounting a Viair clone type compressor in a Jeep JK (3.8L). It mounts on two bolts on the brake booster underneath the master cylinder in a manner similar to the Dominion Offroad or Synergy compressor mounts. The tray bends and holes on this are specifically sized for a TJM compressor, so it is not a universal fit, but I included the solidpart files so you can edit it.
I cut this out of 14 gauge steel on a CNC plasma, hence the tray bends and gusset, which I MIG welded on. If you have thicker stock around, I'm sure you can skip them.