yup they are HID.. they can only use a D2S/D2R sized bulb for your low beam, they wouldn't be using an h7 bulb.
This a D2S bulb ...D2R looks similar
they also have motor which adjusts the vertical positioning of the beam output. If you have the money it's well worth it for HID use as it's specifically designed for that as compared to just putting in HID's into OEM halogen headlamps which usually causes glare for other drivers.
here's some pictures of and OEM HID headlamp Versus a OEM h7 Halogen Headlamp..https://www.celicahobby.com/ubbthreads/thread.f_1869931429_0_collapsed_5__1.html