I bought a CF valve cover from eBay and mine did not fit out of the box either. But it only required minor dremel work to get it to line up right. After 6 months of use, it still looks amazing and there's no "wave" effect that I can tell (maybe I'm just not scrutinizing enough?). I would not hesitate to buy another, I really like the look. I paid $75 (I made an offer on the $125 BIN price) + shipping + emblems.
