This is our 1000HP+ Pro-Level system for the GT-R. Featuring a newly designed outer stub that bolts on to our special billet c.v. for the wheel end. The center bars are made from 300M and are upgraded to 36 spline internals on both ends (up from the factory 27 spline). The Pro-Level system goes a step further than our Level 5 axles by including a Porsche-style chromoly 108mm inner CV with a conversion plate to mount to the factory diff stubs. This kit includes all necessary hardware to make installation a bolt-on affair. Designed for serious horsepower, this kit comes with a full 1-year warranty.