Hi, I was browsing through the Japanese websites and found this
OB LINK made by HKS and it's available for the N54 engine, has anyone fitted one of these? I tried to search online for more info for the N54 but didn't find anything. Functions include on screen display of numerous engine info. and connects to your android phone or tablet by bluetooth... (bad luck if you use an iPhone)
check it out
here on a Toyota 86