I pull GN and 5th wheel trailers so I wouldn't be without my Custom Flow V gate.
Lots of turbulence in the bed with a 5th wheel trailer that requires everything to be tied down. With the vented V gate everything stays in its place.
I've had v gates on big block/small block gazzers and diesel powered pickups. Never noticed any loss or mpg gains with them.
For my use its so much easier to hook and unhook.
'03 Dodge 2500 Cummins HO 3.73 NV5600 Jacobs
'98 3500 DRW 454 4x4 4.10 crew cab
'97 Park Avanue RK 28' 2 slides