This is the all new Pro-Level system for the Cobra platform. This system has been developed to handle over 1000HP at the rear wheel. The new system uses custom made Porsche style cross groove CV's with stronger internal cage and races. We have also made it with a larger center bar (1-3/8" up from the 1-1/8" on the Level 5). It also has a custom outer CV mount that is splined down the entire length of the inside of the hub giving the wheel bearing more support on the races. Rated to 1000HP with a 1-year warranty.