Just some observations:
1. Kenchan is right, there is not much air going under the car
2. we have front spoilers
3. the differential is almost as low as the rear bumper therefore it will block off some of the air approaching the bumper "parachute like" area
4. If someone really wanted to, plug in an airflow sensor right behind the bumper between two cans and measure how much airflow there really is.
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2010 370Z 40 Anniv., 6 MT | Fast Intentions | Swift Springs | SPC | Z1Motorsports | JWM | Redline Oils | 35% Window Tint
2015 Mazda6 | 370ZChicago: Chicago Area Cars & Coffee
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