I have my a2 swap for a while and it wasnt til today that I noticed that the primary O2 that I am running is actually a secondary. Its from a a3 motor I just got the wrong one, I thought that the primary was located first but I have now been told otherwise. Anyways mine has the grey wire not green. Well back to the question, will this hurt the motor or performance in any way? I heard that the base model rsx and type s have the same pri O2, can any one confirm this?