Scion tC 600HP Level 3.9 Axle/Hub kit. When we first looked at Leslie (Durst) Armendariz's axles from her all motor racecar, we noticed the inner CV splines were very large and quite strong, but the outer CV and bar were not. We made high grade chromoly bars with a larger spline, a special chromoly outer CV that has larger splines to handle the HP with ABS rings installed and our new billet inner CV / intermediate shaft. The kit also includes a set of hubs to accomodate the larger CV spline with ARP extended studs. This kit has been tested in some of the fastest tC's and is rated to 600HP with a 1-year warranty.