ok the s5 na has tranny, motor, engine harness, ecu is all removed but i searched forums on whether i can still use the other S5 harness and wiring but havent found a concrete answer... so basically im asking if i can use S5 na wiring if i just use the S4 TII engine harness, engine , ecu and not the rest of the S4 TII wiring??? i have the TII as parts car sitting there but man im so damn lazy to pull all of the wiring........ if its easier to go S4 TII wiring i guess i go that way dont want to fumble around with switching n unpinning crap.....

 

yeah, your going to need all the motor and chassi harness