| the argument that just because youve run ur Z that way for a while doesnt mean u wont have issues in the future is a poor one. i personally believe that the engineers at nissan designed the undertray in order to force air through the oil cooler and radiator. the air flow is then channeled out behind the turbos (instead of going straight down again and creating turbulence, the second undertray preserves this effect) and out underneath the car. in ur situation, most of the air goes down and underneath the car, not only screwing up aero at ur front end, but reducing airflow through the oil cooler and radiator. kind of the same reasoning for the IC ducts, which u probably still have. my point is that just because u dont have any glaring problems from removing a functional part of the vehicle, doesnt mean its not without some detriment to overall performance and reliability.
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