Even with the instructions provided and the diy by RONE, it took me almost 3 hours to install thats including the half hour I spent looking for the 2 nuts for the upper endlink. I went as far as going to several hardware stores looking for 2 22mm nuts. When I got back, I started thinking...weld nuts, check the frame...what do ya know...nuts...I am nuts. I had a hard time attaching the U bolts and the thing that goes under the U bolt to the RSB. I smashed my finger, scrapped my knees, and cut up the top of my hand and my knuckles. I must say, however, the ride around corners and even changing lanes is day and night. I already love this thing. Everybody's reviews were dead on. Thanks yall I am curious...why did I have 4 washers left over??