will the b18c1 head wiring clip onto the si harnes

[99 Civic hatch SI]

I wanted to know if the clips from the head of the B18c1 will clip into the B16a2 harness??

 

[EGLSHB]

if it is an OBD2 GSR engine, then yes... however you will have a couple of plugs left hanging, as the B16 has no secondary butterflys, hence no place for that plug

 

[99 Civic hatch SI]

Thanks. But do I have to change the ECU to the GSR or can I keep the SI ECU??