Here is what you would need for the 2001. The front flaps do not need brackets and will install with self tapping screws to the lip of the fender.
Front Flaps: https://www.sharptruck.com/truck-hardware-gb1223cutf-c
Rear Flaps: https://www.sharptruck.com/truck-hardware-gatorback-mud-flaps-blue-ford-oval-19x24-dually-gb1924f-c
Rear brackets: https://www.sharptruck.com/truck-hardware-universal-fit-mounting-brackets-gb758054
Verified Answer
Admin answered on 1/13/2020