The Tein EDFC unit only works with Tein coil overs. I believe Cusco also has their own electronic damper force control unit for their shocks.
It's worth noting this is quite different from magnetorheological shocks which contain a suspended medium in the shock fluid which reacts to voltage changes which alter the fluid's viscosity. These types of shocks can react much more quickly than the EDFC and most likely what was banned in the racing series. It does take a reasonably powerful control unit and expertise to dial it all in. Can't see it ever being done for the 370 or it coming in at an affordable price point.
Companies like KW, who have electronically adjustable shocks for cars that already come with that sort of setup (Audi, VW, BMW, etc...) are using standard-type dampers and it's usually a "mode" sort of thing, sport, normal, soft.
The Q50 400 Sport and upcoming Q60 Coupe 400 both have selectable drive modes but they're not, afik, using magnetorheological shocks like the Ford Shelby GT350, Ferrari and numerous GM models.
The Tein EDFC with the EDFC Pro Active controller is supposed to be pretty smart and react quickly. I've not used it in the real world but did consider it. Not sure if anyone tracks with such a setup but if it's reliable and reacts as fast as they say it does, I could see it's usefulness. None of their sets for the 370Z are hard core track focused though (if that's what you're looking for).
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