Very expensive for what little benefit they provide.
To me they are just another gimmick. If they were such a huge benefit from their claims then you would see millions of OTR truckers with them but you don't.
What is working for the truckers are the air foils for the cabs and under the trailer. I have seen some rigs with the rear foils off the back end but not very many of those on the road either.
Dr4Film ----- Richard
2002 Monaco Windsor PBT 40Ft. (R HOME) - 30Ft. 2006 Pace Trailer (R JUNK). Trailer Has 06 VUE (R TOWD) 04 Victory Alen Ness Edition (R RYDE). Full-Timer for 14 Yr's BUT now a Part-Timer. Cummins ISC-350 With Banks Power Pack and Upgraded PRXB PacBrake.
Winter Home in Flagler Beach FL - Now Staying in Dansville NY for the Summer.