Its going to be used in a 99 Civic LX. I found a place in Texas to has 3rd gen OBD2 B16A with 5 speed tranny and ECU for $2400. shipped. Thats what I will be putting in the 99 LX. But a 99-00 EX auto harness will work with what I have planed right? Im thinking the only thing would be that there would be a few plugs that may not get used due to it being made for an auto transmission.