Nothing has gone wrong with the car.
The car is seriously fast out of the box - 298 hp, 0-60 5.7.
If I had the money, I would add a turbo to it; not one, but two turbo's. Now with 555 hp - 600 pound feet of torque!
For the price, no car in its class can outperform the G35 coupe.
550hp? who sell the turbo for you car and how much?