A 750 hp Cadillac CTS-V modified by an aftermarket specialists called D3 gets reviewed. The Cadillac CTS-V was developed by General Motors as a tool against the European super-sedans that wear the M and AMG badges. Even though is a lot less expensive than its EU rivals, the CTS-V could never quite match their built quality and handling. However, this D3 CTS-V is definitely teaching the Ms and the AMGs a thing or two about power.