This is similar to our Level 5 axle except the outer CV is made from Billet Chromoly and the internals are also made from the same high grade material, while using the original spline size to fit the stock hubs. To make sure the center bar was up to the task of hard launches, autocross and rally demands, we have decided to use the new 300M material we have been getting directly from the mill in Sweden This material has proven to be without a doubt the strongest and most resilient bar material we have used to date. Also we have recently changed the inner CV from a tripod design to a full ball and cage design with a larger radius to the spline plug for added strength. So there you have it, a direct fit axle that will with stand the most violent launches, time attack or rally applications (ask about the road rally package that uses a ultra high grade grease and vented boots).