I ran a custom made "real" rear diffuser on mine and couldn't get a difference in lap times or improved car feel after several design iterations... the problem is the airflow leading up to the rear axle is turbulent and needs to be smoothed out with an under-tray / perhaps other mods in order to get benefits... there's going to need to be some real aero testing to make this all work and please tell me who has the money to rent a wind tunnel or CFD model the entire car? ideally we'd get this out of Nissan
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