Back when I used to put flatbeds on trucks, the mud flaps were the crowning jewell. They had to be the right length and width for the bed. If fit correctly, they would compliment the truck. If not, they looked like high waters on a teenager.
Helena Trailer Sales was our business back then. No better billboard then hanging from the back of a truck.
White Horse's flaps were riding a bit high, so we put some chrome extensions on them. Now we're ranchin in style.