will turbo s5 driveshaft bolt up to na s4 rear end,if not what mods need to be done .also where
do you hook the boost gauge and manual boost controller to.does it connect where the turbo control valve is.does anyone know where i can get s5 body plug that goes to ecu all i need is the plug .thanks for any help

 

These have all been covered many times!! Use the search button!!!

To answer the questions, the driveshaft will not just bolt up. You can make it work with a few parts from a T2 diff, but why not just do it right and put the T2 diff on in the first place?

Tap into the vaccume line going to the MAP sensor for the boost guage.

Boost controller goes on the line from the compressor housing to the wastegate actuator.