I have a JDM B16a SiR II in my 92 honda civic hb. I'm using my stock CX engine harness. Which i think is not a good idea. But it does plugs right in the JDM b16a motor and works properly. The only problem that the stock CX engine harness doesn't have is the VTEC, VTEC Oil pressure, knock sensor, and O2 sensor. I hooked up VTEC, VTEC Oil Pressure, and knock sensor. But the O2 sensor have 4 different wires. I dont know where the 4 wires lead to. I was told that if i use the 92-95 Civic Si engine harness. The problem of the O2 sensor would be solved. (Not sure, but does the Si engine harness have 02 sensor that can plug right into the B16a?) But it's too much trouble to take all the wirings out the engine. So i found a site that teaches me how to build my own O2 sensor stimulator. So instead i wouldn't have to change the engine harness to the Si. It's throwing out O2 sensor problem. Because the O2 sensor as of now is not hooked up.