My Super C Endura had lots of cab wind and other noises. I put
Airtabs on rear of MH for handling. I had bought a box of 200 of them off EBAY at a great price. Had about 30 of them left over.
I saw this thread in Truck Campers. Where OP put a Air Foil between truck Cab and camper cab. I put a set of Air Tabs on bottom of my cab over. It changed how the air hit cab, windshield and antenna. Made a difference in noise. Biggest change was no bug splattered to windshield.
I never noticed any fuel saving. But did improve handling with the ones I put on rear of MH.
2004 Gulf Stream Endura 6340 D/A SOLD
2012 Chevy Captiva Toad SOLD