Check out Rotopax, I plan to mount two to my premium plus with the Lexus roof rack. Mounting is simple and bolts into the inner channels of the cross bars.
Been driving a Premium + for a week now in AZ 110 desert heat at elevations ranging from 1800-5600ft. Average MPG sits at ~16.5. Coming from a 2019 4runner there isn’t much of a difference but being 2 gallons short on fuel tank capacity sucks. Plan to grab 2 rotopax and mount them to the factory...
My Nightfall Mica premium plus GX was built on May 6th, arrived at port May 17th and received notice from the dealer today it was set for release from QC hold. It’s headed to a dealer in Phoenix AZ. Hopefully it will show up without any more delay.