*UPDATE* - ALIGN AFTER INSTALLATION I've had this kit for a year now. I still love this set but I had uneven tread wear on the outside of both of my front tires. I would recommend doing an alignment whether or not you feel a difference in handling. Have all your curses ready - you will need them. I have never done spacers before and this installation took about 4 hours on a 18 Supercrew F150. No special tools were used and the instructions sucked. I found a step by step video on YouTube that completes the instructions. I used a 2" kit and my truck is now perfectly aligned - looks much better. I didn't need any wheel alignment either and the truck runs just as smoothly as before.