As I mentioned in a previous post, we installed the Cusco Zero-2E coilovers on the STI. The "E" in the name indicates that it's compatible with the Cusco E-Con control module, which gives you remote adjustment of the coilovers' five-way dampening.
Installation of the system is a little involved. There are four little motor modules which each sit atop their respective shock. Wiring leads to a junction box, and then a ribbon cable from that connects to the control unit. The only wires you actually have to attach to the car are power (constant and switched) and ground, but running all those wires to the four corners of the car took some time, plus the removal of a good portion of the interior. The innards of the '08 dash are pretty cramped. We decided to mount the control unit inside the center console. The junction box we hid where the rear cup holders used to live. (Sorry rear passengers, you'll have to stash your water bottles in the doors now.)
After everything was popped and bolted back together, I took the car for a spin and tried out the new remote adjusters. They work! It's pretty slick; you just push a button, and faint little clicks emit from each corner of the car. (LEDs blink on the E-Con display at the same time.) After a few seconds, the dampening changes, just as advertised. You can adjust front and rear independently, or you can link them.
As for the actual hardness of the different levels of dampening...my initial impression is that "1" is great for daily use, and "2" through "5" should be labeled "kidney punch" through "liquefy internal organs." I think I'll be using the higher settings for motorsports only. But really, isn't that the whole idea behind one of these systems? Drive to work on Friday, drive to the autocross on Saturday, and switch settings without every having to turn a wrench. Neat.
Now to find the time to actually get this car on the track...