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Checked out your thread, and your Jetta's rear end is a heck of a lot smoother and not as sharp of an angle as my Tempo's. I'll do some tuft testing when I can. Couldn't today, though. You can tell the VGs made a difference with airflow sticking.
I want to make sure the air reattaches on the decklid. If not, there's a real drag problem there, and I could make massive Cd improvements with VGs.
I'm also looking into some material from Rubber Cal for an air dam and side skirts. I ordered a couple of samples so I can see which will hold better and be easier to work with.
Those were also the brand of VG's I was looking at. They're pretty cheap on Ebay.
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