Because the GT-R wasn't powerful enough already, here is the Nismo version! Uses original SA lights and plates, is actually SA:MP compatible, though the wheels may be a little into the ground (custom vehicles.ide line prevents this in single player)

Uses various source models
Forza Horizon
NFS: Rivals (Thanks to Chipicao for his Rivals importer)
NFS: Shift 2
TDU 2
Asphalt 8 (Thanks to DMN@gamemodels.ru)