In Addition to Terry's post:
A Nur comes factory with a N1 Engine which has:
N1 Twin Turbo's (Ball Bearing / Steel Internals) As Terry has mentioned.
N1 Cylinder Block (Thicker Cylinder Walls / Enhanced Water Cooling Channels to increase flow / OEM Crank Shaft Balanced at a higher level)
N1 Pistons / Piston Rings / Conrods (All Balanced)
N1 Oil Pump
N1 Water Pump
N1 Exhaust Manifold
N1 Air Hose (Cold - Air Duct)