This is our 1000HP+ Pro-Level system for the 350Z and Infinity G35 coupe. The Pro-Level axles feature a Porsche style 108mm inner and outer CV, our largest 30 spline high-grade aircraft quality torsional center bars that twist significantly more than a factory unit, allowing them to absorb a great deal of the shock produced by high horsepower applications. These axles also feature our new bolt-on outer stub that fits the factory wheel hubs and precision billet adapter plates with hardware to mount to the factory differential stubs. Price listed is for both axles.