Vintage tech..

The original HKS EVC.. the EVC 1.. HKS 'Electronic Valve Controller' boost controller.. hit the market in 1987. 25years ago now.. 

Ignoring the slight variations there; thats the original EVC
HKS are now up to the 6th generation for this product; but the basic task is the same.

and yes.. I just prowled ebay looking for one.. :P