There is a pic of the Volk GT-C on that wheel-list page, I was told they don't fit VR-4's because it won't clear the brake caliper
I have a set of Volk GT-Us on my car, they are all 18x9, the fronts are a high-pad style and the rear are mid-pad style and they are both around +31mm offset, I can't remember exactly what the offsets are, here's a pic...