the shot that reall grabbed me here was the rear end of the MG. looks great.
as a tip, however, you might try two things:
first, try and zoom in from as far as possible. From what I read from Magburner, GT4 has some really good scaling, and so you end up with alot less Jaggies, right off the bat! it makes the pictures look SO much better, and they need far less editing.
Also, try to up the exposure in game in you can. it generally comes out at around .2 less on a computer monitor than it's shown in game. Ex: if you want an Exposure (EV) of +.2, up it to +.4 instead. it'll come out slightly darker, and it should be just about where you wanted it.
If you do that, you don't need to add quite so much brightness and contrast. and if you don't add as much of those, you don't end up with those uneven colours like you got with the rear end of the MG. look at the pavement. the colours aren't smooth. if you didn't need to add quite as much contrast to achieve the same lighting on the car, that unevenness wouldn't happen.
overall, a good PMC styled gallery, without all the fancy effects. keep shooting, keep learning, and keep the rubber side down!