Quote Originally Posted by EmotorsportsE
The undrside of the chassis will be different, there won't be the hump for the AWD tranny in the GTS-4. Will need some modifying.

E
In the GTS there is no hump, in the GTS 4 there most certainly is but then he wouldn't be asking us if he could convert it to AWD if he had a GTS 4 already. You can do the swap but it is not an easy one. There is a lot of that you will need to do the swap including parts of the harness since the GTS did not have any of the AWD harness in the car. Its not a simple mechanical AWD system so there are quite a few components necessary to do the swap. For the money you'd spend to convert one you could be close to simply buying a GTR and then you would have a real one and not a hacked up copy.