Mud flaps were originally offered as a Volkswagen dealership accessory. High quality units are a bit harder to find these days. You can always tell a cheap quality set. The VW logo isn’t formed properly, and sometimes does not even include the “W.” Our friends over at Air Cooled Accessories have some of the nicest we’ve seen.
“Please note. Unlike others available, our sets include full heavy duty mounting hardware. This means heavy gauge brackets, backing bars, and all bolts and washers to enable fitting. They weigh nearly 2KG to give you an idea of the quality.”