They do not. The brackets have to be purchased separately. For the 2016 you only need rear mounting brackets, that part number is GB755007
https://www.sharptruck.com/truck-hardware-custom-fit-mounting-brackets-gb755007
The Razorback flaps do not come in a dually truck size. Gatorback flaps will have dually flaps for your truck, https://www.sharptruck.com/truck-hardware-logo-mud-flaps
The flaps will work. You will install the front flaps with the included self tapping. With the rear flaps, we would recommend this bracket, https://www.sharptruck.com/truck-hardware-gb756802
You would want this bracket for the rear wheels, https://www.sharptruck.com/truck-hardware-gb756056
The front flaps install with the included self tapping screws