Get out there and autocross your G35, it is a blast, and the car is very competitive even with the length of the wheel base. I have run twice in the last couple of weeks and finished ahead of all but one 350Z, all the Mustangs and Camaros and all the most of the Corvettes. A word of warning, the stock tires on the 19 inch wheels are no match for the power exiting corners, get some Kumhos 710 on 9 x 18 in the front and 10 x 18 in the rear and strap yourself in for a great time. Take off the traction control and go Z hunting.
Great all around car, even room for a car seat and it really turns some heads with the Volk SF Winning wheels and Toys tires feeling up the fender wells.
The limited slip viscous disc lock up capability needs to be improved so the inside wheel spin stops under hard exceleration when exiting a turn and the power is distributed evenly to both rear wheels. The front spring rate needs to increase for the sports suspension package, 250 lbs is too low.