Hello fellow rotor heads I have a question, Im doing a s5 jdm motor (turbo II) and dropping it into a s4 body, I would like to know how different is the engine and body harness gonna be as in emissions crap and etc. , the engine harness is for an s5 but usdm not jdm remember the motor is jdm and the body harness is for an s4. The reason I ask is because some plugs arent matching up into the body harness by the Ecu. Any help would be appreciated Thank You.

 

i dont know much on this but i know alot of guys will be telling ya to start off with an s5 car to begin with its much easier overall to install less headaches. i was also thinking about doing this but i figured if i am gonna do a motor swap ill lean more towards a 13b re

 

http://www.rotaryresurrection.com/2n..._s5_diffs.html