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If you are ever in Calgary stop by Vex Performance and try to get a ride in this car! It defies the laws of physics. It is seriously fast. You would not even know you were in a heavy luxury car when he lays into it (and we were going uphill). BTW Jimmy- my wife and friends were terrified at the sound of your car building boost in neutral!
Huge thanks to Vex for the OS-Giken diff they installed in my GS400. The car has so much grip now it is difficult to even spin the 275's on the rear. I am looking forward to taking it to the track again in the spring. It got old quickly this season with the stock open diff. The car wouldn't put the power down leaving turns when I wanted it to stick because the inside rear would spin, and drifting had to be forced because the open diff was working against me the whole time.