Seems legit.
It's probably just a bare body with some suspension components and no engine (at least not with the spec they are claiming.) If they find someone stupid enough to consider investing in one, they'll try to figure out the actual mechanicals. Creating a 5000hp V 16 engine from scratch would be absolutely insanely expensive, and as such it's reasonable to claim BS on the whole car. At least with things like the Venom GT they just basically had to boost a crate engine to get to the figures. When building a V16 there are absolutely no major components you can borrow from existing designs..
EDIT: Just noticed the brakes :lol::lol: