When I asked on a couple of forums, I got no responses at all. I emailed the company with some questions about their claims (particularly the claim that since they hang lower than the full width mud flap they better protect the toad as everything I have read indicates that the lower any flap hangs the more debris/rocks it will sweep up and into the toad). I got the following reply...
HELLO PAUL,WE HAVE A CUSTOMER COMING IN THURSDAY WITH OUR MINI-SKIRT ON THERE COACH AND THERE COMING FROM ALASKA. SO WE'LL SEE HOW THEY HELD UP. GETTING BETTER ECONOMY, I DON'T KNOW FOR SURE, SOME PEOPLE DID AND SOME DIDN'T SEE ANY CHANGE. KEEPING THE ENGINE COOLER, YES, THERE'S MORE AIR MOVING THROUGH THE RADIATOR. HOPE THIS HELPS YOU.
I'm not sold at this point...
Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '17 Jeep Grand Cherokee toad