I had one of those connected to a boost controller when I first got the car. I don't know if the switch was OEM? It was a good fit but looked aftermarket compared to the others there.turbo timer, heres another
http://zilvia.net/f/sale-items/428520-extremely-rare-datasystems-oem-turbo-timer-switch-s13-s14.html
also think yours is a dealer installed option, not an OEM. think above is only nissan oem.