2. Is this a GT race car’s front unit?
The answer is “NO”.
This is the front unit of the new Nissan GT-R production model. Looking at the cylinder cowling layout, you presume it should be a GT machine finish.
As for the intercooler, there are two independent intercoolers for each bank of the cylinder blocks. Further, the large air-cooled engine oil cooler with thermostat is equipped under the left headlight.

Text: Shunsuke Takeuchi
Photo: GTR-WORLD.net

This means it seems to be the cooling performance is good enough. Moreover, there seems to be some free space under the right headlight. And the duct on the right side of the bumper is nailed the lid. Some cooling device might be installed here for the expected high-performance spec.