Here it is everyone! Since I was the 1st on the list to get one, figured that I'd post the DIY. (8 steps)
1) I'm only going to show 1 side of the install. The other side will be exactly the same. Here's the driver side rear seat belt assembly. Your's will not look like mine. I cut mine so that the previous c-pillar car I used, the J's Racing one, would fit with the cover piece on.
take off the cover. It just pops off.
2) The seat belt is held on by a 14mm bolt.
Take the bolt off:

3) DO NOT forget how the bolts go together. You DO need to disassemble the washers and bolts to install the bar:

4)Now, i find that it's easier to do it this way, but it's not necessary. I disassembled the c-pillar bar.

5)Then install the bracket for the c-pillar bar:

here's a pic from another angle:

DO NOT TIGHTEN THEM FULLY!!! Leave then loose so that it's easier to adjust if you need to later.
6) Ok, now for the hard part. The c-pillar is adjustable. What you need to do, is figure out the length of the bar. As you can see it's too short.

Here's the original length:

Here's the length after I've adjusted it:

Notice that the adjustment nut is backed TOTALLY off so that the bar is easily adjustable later if needed.
7) Stick the bolt through once you've figured out the proper length. Then tighten everything down. (seatbelt bolt and the c-pillar bar to bracket bolt.)

8) Last step, adjust the actual bar, the carbon part, to put a little bit of tension on the frame, tighten down the adjustment nuts (the ones that button up to the bar) and you're DONE!


Thanks AJR for the putting 1st on the list! Love you guys!