Okay, I'll be the 1st to say it, and I'll be as nice as possible:
That thing is *hideously gawdy*. I don't even think they look good on the actual rally car!
...however, if you're really looking for that authentic rally car look, you really can't beat that. Plus, it's probably pretty functional, since it really seems to match the design of the WRC wing closely. I'd just never put it on my car, unless I was building a real-deal rally car that needed it for aero purposes.