im trying to put a gsr swap into my ek. i think its obd2

 

if you have a 96-98 get a 96-98 EX harness

if you have a 99-00 get a 99-00 Si harness

 

do i have to cut any wires? cuz some wires doesn't reach over im thinkin bout getting some 99-00 si engine harness

 

you're going to have to wire the secondaries on the intake manifold and extend the second o2 sensor i believe.

 

not to jack your thread or anything. I am going through the same thing.. I have a 2000cx hatch and Im putting in a 99gsr swap. what harness do i need ? I tired to plug the gsr ecu into the stock cx harness and only 2 connectors fit.. Will the ex one work ? and also is the wiringharness in 2 pieces ? Or does it come from the ecu straight to the sensors ?

 

i have teh ex harness because it goes straight to the ecu it plugs right up to the gsr ecu