At 32 psi 1360 wheel horsepower was hit. At 39 psi this went to 1409 wheel horsepower. With 45 psi and some nitrous this goes to 1560 to the wheels. Keep in mind, this power is at the rear wheels. Also keep in mind this is on a Mustang Dyno which usually will read more conservatively than a Dynojet.
The engine is built by EVOMS out in Arizona but beyond that we do not have many specifications. Hopefully @undercover will give us further details (along with the graphs) but for now we know E72 fuel, a Pro EFI ecu, and Undercover updated fuel system were used.
A very, very powerful Porsche 996 Turbo and until anyone shows otherwise it is the most powerful 996 Turbo.