As the title suggests...I am buying a S5 harness off someone and wonder if it would fit a JSpec block. Thanks for helping me out!

 

as long as you are putting theS5 harness and Jspec into a S5 body

 

worked for me.. S5 J-spec into '90 TurboII.

 

you need the USDM one. the J-spec one doesn't fit

 

Arent some of the connections in the wrong place because the ECU is mounted in a different spot in a JSpec car? I would think you would have to have a US harness in a US car. The JDM would be good for rebuilding an old harness though.