i honestly just searched for the energy suspension web site in google and got a part number and ordered from them summit has the same kit for a little bit cheaper if i remember right....
Here is there website....
http://www.energysuspension.com/
you will have to click on the little book on the left side that shows application search.... scroll down get the part number and copy and paste that back into the search bar in google and it will take you straight to the page to buy the item from on the website...... easiest way to do it..... sounds complicated i can tell ya its not