The GTR Pro-Level Axle/Hub Kit is the same set of axles you will find under the fastest GTR's in the world. This kit features a larger than stock 33 spline outer CV made from a high grade proprietary material, Porsche style 108mm CV's on both ends with upgraded 30 spline 300M internal races with billet 4340 cages. Our 300M aerospace quality torsional center bars that twist significantly more than a factory unit, allowing them to absorb a great deal of the shock produced by high horsepower applications. The axle kit also includes our 300M differential stub flange upgrade with all necessary hardware to mount them, and a set of larger spline wheel hubs to accommodate the bigger spline on the outer stubs. Price listed is for a complete kit.