What exactly do you expect when you say "dramatic"? Think of it this way. If Honda had thought that a cheesy skirt kit would improve performance of the vehicle, don't you think that they would have put it on the car to begin with?

There is absolutely no gain to be had from any body kit you can get except for two that I can think of: the true Mugen kit like someone else has already stated, and a racing air damn and dissipater that would be used strictly for racing.

Keep in mind I'm talking out-of-the-box kits. I'm sure you could have one custom made if you really wanted, but I kinda doubt that you have the means or knowledge to build a body kit that, when tested in a wind tunnel, will improve aerodynamics and vehicle stability at varying speeds.

What I'm saying is, from a true engineering stand point, there is no reason to put a body kit on your car. You will not see any performance gain, and you will in fact increase the aerodynamic drag on your car, which will cost you gas mileage and high-speed acceleration. In extreme cases, a poorly designed body kit can even cause the vehicle to become unstable at high speeds because it causes excessive lift/drag, or significantly alters air flow that was designed into the vehicle to maintain stability.

Just stick with your OEM body panels, and if you really insist on getting a body kit, find yourself a JDM front end.