Info for the aerodynamics provided by Honda Co. Ltd Japan:
-The NSX-R carbon hood will result in -0.025 coefficient of lift reduction value. The number is negative because we don't want lift. The hood duct inside the hood will be -0.010.
-The front bumper undercover with the battery tray is -0.040.
-The rear spoiler is -0.085.
-The NSX-R OEM small factory diffuser is -0.002 and also has a Cd of -0.003. This is negative drag meaning the diffuser improves the drag coefficient.
-These lift reduction figures reflects wind tunnel testing with the NSX-R underbody paneling piece by piece.