Hi All,
The Basjoos boat tail is designed so the point is above the center line. This is creating a upward motion of the air from underneath, and around the lower half of the car. This is good for stability, and pulling stagnant air along the sides to fill in the rear flow.
A diffuser is limited in the amount of air it can direct, as the air into it is only from beneath the car. The BT can pull air from aside the car upward and backward too.
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