to my knowledge, the EDFC will fit any Tein coilovers that have adjustable shocks, and the SS (Super Street) have em, so if you have the extra $300+ and want to be able to remotely control the shock stiffnesses of the front and rear shocks independantly from inside the cabin, then by all means go for it. I played with an EDFC at a shop around here and it's probably one of the coolest little gadgets out there...I'd highly recommend it if you have the money.
Also, you can find Tein SSs for under a grand...they're $900 at
www.evasivemotorsports.com