Yes, I have a C-Max, and I'm aware that Ford did a decent job on the Cd, but it still punches a big hole in the air. I don't have a target Cd, but given I'm already running in the 2g/100m range for FC, I suspect the car will acrue more FC benefit from aero improvements than something less efficient. I've already done the front, and upped tire pressures... what's left? Beauty is not a driver, but will be considered...
And what is a semipermeable box cavity?
Have fun,
Frank
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