I'm not a huge thread maker, but I thought this was an interesting addition to the game that doesn't seem to have been discussed.
So apparently with the recent update, Rockstar has decided to add some realism to the modification options. Spoilers actually create downforce. If you scroll down the spoiler list you can see the traction bar go up slightly. (I'll edit in crude iPhone pictures in a bit.)
So what do you all think? Will you be adding spoilers for that extra leg up in races, or do you prefer to take your chances to have a better looking car? I for one don't like spoilers on my cars but since my crew is full of try-hards I'll no doubt be forced to put them on for races.