so when I bought the WeatherTech mats I installed the rear mud flaps they sell.... what a mistake.... the are easy to mount, easy to clean, and they look great.... BUT their function is very poor... need to be at least 1" wider in the inside and outside of the truck for a total of 2" and at least another 2" longer...
When I wrote them and told them.... how terrible they were for coverage, I'm trying to protect my 5er.... they said they wanted something you didn't have to drill and custom mount.... and nicely told the gal, I didn't buy them for looks, I expected the same protection from my mud flaps I got from my floor mats, which I love....