and a GTR, yes you can take out the front driveshaft, which is the safe way to run it in RWD, pulling the AWD fuse out is still a bit of grey area. I wouldn't pull it out and do a full trackday on it. Its OK for a small blast. Most drag GTR's who wanna run RWD just drop the driveshaft.However, the drifeshaft only accounts for a small amount of wheight of the car. The chassis of the GTS4 is different to a GTSt, its actually the same as a GTR. The weight comes from the added assemblies which are hard to take out and put back quickly/easily.