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My original point was just that it's a bit of novelty to see how thermally-efficient systems work. However, water-to-air intercoolers are more thermally-efficient than air-to-air (and are easier to package...esp in the case of the M5/M6) but when ambient air temps are high, not much you can do other than try to drive intake temperatures to ambient (still hot if it's 95 deg F outside). The M4 system is more carefully designed for more efficient cooling than the M5/M6 system, due to redundant intercoolers (two) and volume of the system.
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