Meh, I would assume it's curves, since levels would remove most of the detail from the front fairing (I tried levels first and it looked crappy, removed too much grey) Either way, you can really fuck up the tones of an image using curves, but it's the uber way to make your pictures look super teh awesome when the original wasn't very clear. You're right though, it's not saturation in PHOTOSHOP, I couldn't fuck it up to look exactly like that with saturation, although you can get it pretty close. But "saturation" is a subject of how much grey is in a color.... if you remove all the grey it's over-saturated