Sorry. Looks terrible because it looks like an afterthought. The CS does not need anything let alone an add on lip.
looks alot like the fiberglass / cardboard wings that 16 year old kids put on their honda civics with the fart can mufflers... I'd stay with stock in this case --looks better..and the cs has a nice front bumper on it to begin with..
Put that lip on, some spinners, and a wing! Then, chop the top and you have one mean stradale convertable...
Like Jeffrey said, the CS is perfect needs nothing. I personally would never modify any body parts on a Ferrari, just my opinion though.