Bought for my 2015 Gmc 1500. The perfect landing took about 45 minutes for the driver and 15 minutes for the passenger. I just took the tires off and took out 2 bolts, used a pry bar and 2 people. I'm certainly not a mechanic, but it was easy! Just take one screw at a time. 2 inches was perfect for him to sit flat. I'm not sure yet what tire size to use, but I see a big difference. Not the best photos!