Quote:
Originally Posted by Mr. Previa
Time will tell.
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You are right that time will tell, but I'd predict that Connclark is correct about the aero costs. Your best way to find out will be with A-B-A testing. I love your initiative and this is close to a mod I want to do, but I plan for 2mm thick and flexible panels that will form-fit to the roof. This thicker panel mounted on the roof rack looks a little like a wing. I think if there is any way for you to do it and are committed to this hardware, you could move it to the trunklid. You might even make it a bit of a trunklid flat spoiler if it won't fit on the available surface. There would still be aero issues there, but I think they'd be less significant that your current wing-like roof mounting. Maybe others will chime in pointers.