You're right about it keeping the ricers from trying to race you, however you'll end up having them try to talk to you everywhere you go. Telling you how "cool" your car is, and asking if you have "naws".
It will also has the effect of making all the real cars want to race you. Weither it's to find out if your car is as fast as it looks, or remind you that your car is still slow... they'll make you feel like an idiot everytime.
Here's mine:
Someone crossed traffic and hit me so insurance paid for the body kit. I've been trying as fast as I can to get the car to move ever since then. A '95 AODE vert is not the fastest thing on the road, even if it is a GT.
The three companies
cyberstang5.0 listed are all known for their high quality kits, and each has a unique look. Good luck with whatever you decide to do.