You are only editting your save file, the save file contains only customizable parts that PD itself allowed.

This won't be possible because it is a standard car and Polyphony stricted coded Carbon hoods for premium cars, attempting to place it in the same offset for standard cars will lead you nowhere but the same stock hood, this is part of the game file itself(CD data).

The difference between game files and save files is Game Files are basically what every game reads, In order to edit those types of files you need Jailbroken PS3 + need new offsets + know what you're doing.. because if you screw up then that's bye bye to your CD.

Save files only have a limited amount of edittable data, you can only do so much with hex.

In other words..
no this will not be possible because the games graphics/images were never coded to have a carbon hood on a standard car.(Where as taking off spoilers or hoods on premiums were ONCE placed onto the data when the models of the cars were being created so that made it possible)
In order to change parts it needs to have customizable parts in the first place, which bring the offset in, but even if you paste the same offset from an exact premium replica onto a standard it won't work because the game will simply ignore the pasted offset in a false section because it was never coded to work like that(Taking spoilers/hoods on premiums editting HP is just mixing up data that already exists within the game, this is a different aspect)