so like the title says i am turboing my Galant Gsx. I am swapping engine harnesses instead of adding the additional wires that would be needed. My question is the vr4 harness has an extra plug after it comes through the firewall, not the ecu plugs but it has three that go up from there, my Gsx harness only had the two additional plugs that went up from the ecu. anyone have any idea of what it is for? I will try and post a picture of the two together tomorrow or if Paul gets on here maybe he can take a pic and post it tonight.