Stock VH45DE makes

276HP @6000RPM
310ft.lb @ 2500RPM

These numbers are under rated by Nissan because of the "gentelmans agreement between Japanese car manufacturers. (no car should produce more than 300HP) The actual numbers of the VH45DE are closer to 300HP and 330ft.lb torque.

And this is just a little 4.5L with loads of upgrade room.