i think i asked this question a while back- never got a reply. im thnking of buying a s5 GXl to put my s4's power/drivetrain into. what all would need to be done to make this happen other than regular stuff?

 

time and patience. the drivers side harness can stay in the car as long as u have an aftermarket boost guage, u need to add a knock box underneath the dash on the passenger side, as well as swap the entire harness with the t2 one.