Why a wing can be useful on a FWD car...

FWD cars naturally under-steer. At low speeds, this is all they may do and require you to go through corners slowly. At high speeds (60 MPH and above), letting off the gas or getting on the brakes transfers weight forward which can cause the front end to lose traction first; but ALSO, if entering a corner, can cause the REAR (which already is generating lift) to get light enough to want to spin. There have been MANY crashes of FWD cars that spun under trailing throttle conditions (and Audi had to recall the TT to add a rear spoiler to fix this).

Suspension wise, you can counter the tendency to under-steer at lower speeds by increasing stiffness at the rear, either with stiffer springs or with a larger sway-bar. This makes the car turn in better, meaning you can go faster through the low speed corners (say going through a corner at 40 MPH that would have had to be gone through at 25 MPH before). Unfortunately, this makes the car even MORE unstable when slowing for a higher speed corner (or even just going real fast in a straight line). What to do?

Enter the wing. Adding the wing will not affect the car noticeably below 60 MPH or so, meaning the larger sway-bar allows the car to go faster through low speed corners, but by removing rear lift and adding rear down-force, even a tiny bit, the car can remain stable entering a corner at 60-80 MPH (such as a freeway offramp), thus increasing speed though faster sweepers, as well. On a road course, this means greater corner entry speed and greater exit speed, making the straights between the corners "shorter" even if you've reduced top speed by 5 MPH or so with the added drag of the rear wing.

In this way you can actually make a car faster from point A to point B without adding a single horsepower AND while reducing the top speed slightly.

The point of this lecture? A rear wing can help a FWD car if properly adjusted (though most street cars aren't) and an improperly adjusted rear wing will most likely NOT negatively affect a street car at legal speeds (though one with a negative Angle of Attack can generate more rear lift making the car more unstable at speeds over 60-80 MPH).

Oh, that brings me to another myth: Wings only work at high speed. Too often we see people looking at a car with a rear wing and saying, "I hope he plans on going over 150 MPH to need that wing" or "that car can't go fast enough for that huge wing to work."

Wings start working as soon as air is flowing over them. A Piper Cub airplane can FLY at 35 MPH [the larger the wing (in relation to the mass it's working against) the LOWER the speed at which it becomes effective. In fact, it could be argued that the typical huge double-decker "ricer" wing is necessary on the slow cars precisely because they are too slow to be able to make a smaller wing work. You want to test this? Drive at 50 MPH with your hand out the window, palm flat down. Twist your wrist up and down and feel the air push your hand up and down. Now picture something with 30-40 times your hand's surface area at that speed.

Is that the wing that Mad_John has? Would like some pics of it installed too...
Is there any chance you could make it in CF?

Wings start working as soon as air is flowing over them. A Piper Cub airplane can FLY at 35 MPH

That should be made a sticky.... And then sent over to AR =P..
I like the wing, I dont think its rice at all. Id be interested, depends on the cost tho

I like them to and think they look good on on the RD2, I have been looking into getting one of these so a mounting system that picked up on our existing spoiler holes would be appreciated for sure!

the lower stands would probally look the best on Rd's. although some may hate the wing idea, some absolutely love it.

What do you mean fly? generate lift? then a piper cub can fly at 0 MPH. hell, a piper cub can fly at -MPH (backwards) if you find the right winds (I've done it).