Never seen the GTR Mustang...that is a pretty good laugh!! Yeah, the VR4 might put a car or so on the WS6 off the line since it is the 6G72 Twin Turbo and AWD, but I'd say when the 3K is getting ready to come out of 2nd or is in 3rd the WS6 will have overtaken. LS1 T/A's run LOW 13's stock and 3KGT VR4's run high 13's low 14's. Now a bolt-ons and tuned TT 3K...better watch out IMO.