The Charger gets some cool spoiler options that also affect the rear bumper a little bit. It has 2-3 different choices, I chose this one cause it fits with the wheels and the hood. The RX-7 gets a nice rear diffuser that now fits with the front bumper. I have removed the wing on both by the way.
The Corvette C7 gets cool little carbon spoilers in front, side and back with a diffuser. The FXX can be painted and the stickers will change according to color, but the wheels cannot be painted or changed at all.
The 370Z remains the same as in GT5 but now the 350Z gets something similar. For the 350Z, that was the second option, the first option is the same parts but painted. The 350Z also gets a small diffuser in the back and as you can bairly see, you can give it a small wing. Pretty cool.
The Silvia now finally gets a back spoiler which fits perfectly with the rest of the car. The S2K now has a rear diffuser (not suer if it was there in GT5) and it fits with the kind of extreme spoilers it has for front and rear.
One of the most extreme cases. The Trans Am. It has 3 different bodykits which all have pretty much different parts, I chose the most extreme version. This version not only adds parts in the front bumper, side and back, but also gives the car those small extra parts on top of the front fenders, next to the hood (they are more visible in the second picture). It has 2 custom wings and you can also remove the original wing, and it has "special" parts which either cover the door that splits the roof or change the material from metal to plastic and even cover the back window. The car is equipped with Racing Soft tyres and when you choose racing exhaust, the exhaust moves to the left side of the car, in front of the back wheels. No matter what color you choose, the decals of the Bird on the car will be painted accordingly to be distinguishable.
Neither the AAR Cuda 340 Six Barrel nor the Nova SS have such extreme modifications, both just have a custom rear wing and a front spoiler.