HKS EVC 4 electronic boost controller, still the best one to have and use.
Came off my EVO for SVA test and registering & never put back on It will fit any turbo car, I have seen them on a couple of turbo diesels too!
Only selling it as im getting a Blitz fuel/air controller and boost controller to work with the Blitz ECU on its way from Japan or I would keep it.
Instructions are available from HKS website and any good mechanic should be able to fit it easily.
I'm looking for around £150 for it, but i'm open to offers (good looking sisters or mums in p/x might be of interest lol)
Anymore questions let me know.