actually... it's a new engine.
Different block design and material, no valvetronic, direct injection with piezo-electric fuel injectors running almost 3000 psi... it's the N54. a new, different engine than the N52. if it was just modified, it would have a different designation, like when vanos was first added to the M52, it became the M52TU. We don't use TU anymore, but it would be something like N52V2HO. but it's not. It's N54.