I'd say the basic frame, so floorpan, a/b/c pillars, and the cross braces across the top of the pillars, and the firewall.

Probably the strut towers front and rear as well.

Otherwise it'll all carbon fibre, every removable panel, and the roof.

It probably runs an evo rear diff, or at least an evo based one, because the strong point with these cars isn't just the AWD, it's the AYC, so it would use the AYC pump and controller, which means front/rear diffs are still Evo, or Evo based.

And then of course the engine, it's likely still a factory block, but it may well be a billet one, just for reliability.

And it's probably a stock head. Obviously heavily modified.