You forgot to upgrade the brakes... The broken heart down the rear of the car can go too, and so can the graffiti. Other than that, it's perfect.

Move this car to a new garage, away from the 'simple' cars.

It's to busy for me. The vinyl seems cluttered and all over the place. Those rims are much to large for the style of car, and there needs to be some semblence of a theame. These cars are best done with some basic "muscular agressiveness" in mind. Check my garage, where you will find three mustangs there. Each are rather agressive in nature.