The 21x24 flaps are what you need. Just pair them with these brackets for the rear wheels, https://www.sharptruck.com/truck-hardware-custom-fit-mounting-brackets-gb759895
If you would like the full truck set you can find it here, https://www.sharptruck.com/ford-f450-f550-blue-oval-gatorback-dually-mud-flap-set-gcr41f-4-gb2124f-c-gb759895
Verified Answer
Admin answered on 9/5/2018