This is probably one of the most functional body kits never produced for the NSX.
Some observations and guesses:
- Slightly longer, lower front bumper with integrated air dam and fixed headlights.
- Vented front hood: better cooling and added downforce, also diverted air around cockpit instead of simply up and over. May have been able to keep the spare tire.
- "Filled in" door and lower side skirts: later implemented in production form in 2002 and later NSXs for drag reduction.
- Rear wide body quarter panels: vented design nearly used on all JGTC NSXs later to remove air from wheel well area. Extended section over tail lights to help aero: see FXMD's race car.
- Higher rear spoiler to put it into cleaner airflow for increased effectiveness.
- Rear bumper/valence: looks like a modified exhaust is used that sits high against the trunk to allow space for a functional diffuser. Perhaps even a double diffuser before double diffusers were "cool"? Bumper continues the taper from rear quarter panels to a Kammback design to reduce drag.
To me at least, the body kit is remarkable.