First off. Get the Serial number off of the axle before you install it !! you will need this number in order to activate your warranty. The axle installs just like any other but this is much beefier than the stocker. The multiple rings on the spline is a great addition to be able to widen out or narrow up depending on conditions. I use Rock billet wheel spacers on the front to widen out for dunes and racing and then remove them and move all the rings and put them on the outside of the hub and replace nut for a more narrow stance.. These are top notch axles and ive seriously abused mine on a raptor 700 and yet to even scratch the finish.