Hi Trucker John,
What kind of gains are you measuring with the VG's?
Are you fitting them to all the places on the trucks recommended? (IE trailer rear, trailer gaps between trailers if B-Double, Rear of the cab / sleeper unit...on top and sides for all those..and then also fitting prior to front wheels, rear of any toolboxes, and on the bonnet(Hood) around 1/3rd in to deflect over the windscreen?)
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