It's a very cool chop. You've gave the scirocco a whole new look (in a positive way).
But I would like to see a bigger resolution, because it's now a pretty low res to judge.
The cf hood looks pretty cool, it's good executed. Also the new vent in the hood is a nice touch. You have (almost) no changes to the fb, but it does fit the style of the car perfectly. So it was a good thing to keep the frontbumper standard. The darker lights do fit the dark hood very good, it makes the car look more agressive!
The wheels look very good too. But the rear one is jagged. This could be due resizing the pic. But the front one looks a bit blurry. It's also a bit too big. It should be very hard to turn now. Just one or two inches smaller would make a whole difference.
The undercar shadow looks good, but it's a bit too sharp. You could try to gaussian blur it, would look way better.
The windows could use some more reflections, they are to matte now. Just some cloud refs would make already a whole difference. But don't set the oppacity of the window refs too high, because it wouldn't look pretty realitic animore then. Just play a bit around with the oppacity of the window refs
The car does fit the background very good, I must say. Also the darker lights ant the new rearbumper are a very nice touch!
overall it's a very good chop, keep up this kind of chops!
...for the wheels I'll try to adjust the front 
