Looks like it to me. Some of the drawing numbers are off from the paper version of the I4, but it seems like everything is for the V6.
I didn't think that the "supplement" would be 834 pages long though. That's almost the same as for the I4. In reality, I'd have thought the "supplement" would have been about 320 pages or so max, with the I4 and V6 sharing other parts of the book, not a complete book itself. No wonder HELM Inc wanted 70 bucks just for it.