The Arrma Quake is a perfect 2wd basher out of the box EXCEPT it either rolls over or grinds its beautiful body with its wheels nearly every corner (in grass). This fixed all of that entirely and reduced diffing out in corners. Little diff oil manipulation and you got yourself a perfect 2wd basher. The kit includes (but isn't pictured) all necessary hardware and no instructions LOL. I used 2 washers on front axle and one on rear to shim; turned out better than stock. Extras for the bag was nice!