I am putting in a b16a swap in my 89 crx dx. I have a buddy that has a 89 si wire harness, all all ready modifies for a b16a. Will the strut tower to strut tower si harness clip up to my stock DX harness that goes through the fire wall? Or do I have to rewire my DX harness?

 

Nope they wont plug into eachother the plugs are completely different so you would either have to rewire the plugs (making sure you get all of the wires right and adding the ones you need and also swapping some at the ECU) Or you could just rewire your DX harness which would be a lot easier in the long run considering you dont have to try and rematch wires at the plugs since you will still have to add the wires and also swap the wires at the ECU.