RX-7 with Ford 8.8 Differential Pro-Level Rear Axle/Hub kit. The Pro-Level axles use our new larger diameter aerospace grade axle bars, larger 33 spline outer CV's with wheel hubs to accomodate the larger splines and ARP extended studs. This kit also features our 108mm Porsche-style inner CV joints with our 31 spline bolt-on inner differential stubs. ABS rings are not included, but the outer CV's are machined to accept the factory ABS rings. The axles are complete and ready to install and do not reuse any of the factory CV's.