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Hi y'all,
Well, I ordered 21 black Airtabs (9 for the roof, 6 for each side), which came to $52.50 plus ~$11.50 FedEx shipping. I'll report back with some MPG results...
I thought about these compared to the Vortekz fins -- the Airtabs work individually, whereas the Vortekz work in a group; and so the latter really would only work on the roof. They also seem like they cause a pair of "larger" vortices. The Airtabs also have a lot more technical info and a lot of (authentic sounding) testimonials.
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