Sure it's functional... on the ITR. I'm not sure I could tollerate the ITR spoiler even if I had an ITR. Even if it's beneficial creating downforce, I would still feel silly every time I gazed out the rear view mirror.

The same goes for the potent EVO and STi. I was behind one of them the other day and couldn't help but giggle. It's obnoxious for daily commuting (IMHO).

I say sell it on eBay. Buy something respectable with the money you'll make.