Thanks for the support guys.
We just found out that another tenant (non-automotive related) in our business complex was also burglarized in the same manner over the same weekend. They didn't discover it until today!
So it appears that we weren't specifically targeted, probably some crackheads.
My topmount manifold has "SPEEDFACTORY" CNC engraved into the head flange as well as having a unique runner configuration, so it should be easily identified, not to mention my valvecover.
Things are being handled on our end. We will find out who did it, it always comes out in the end. You can't hide something like this forever. Taking all that custom stuff is just plain stupid.
Inside job or someone close is usually the first guess, but this wasn't an inside job, everyone from the shop was out of town on vacation over the weekend.
They didn't have to disassemble anything, all the parts were stacked in bins/boxes, and the H22 swap was all together complete. So 3-4 guys with a pickup could've taken it all in 2-3 minutes.
Without going into too much detail, we have 7 bays in 2 seperate buildings, and they failed to setup the sirens and link the buildings alarms like we requested. Let's just say that we are very heated with the alarm company for failing to set up the alarm in the manner that we requested, and they won't be making any more mistakes like that again.
Unfortunately we can't fence off our location and have dogs, but there are apartments directly across the street with ~30-40 units that have a direct line of sight to our building, and it's a small city so police response time is pretty fast.
Please let me know if anyone here catches wind of any of these parts!