I do modsCountry: Malaysia
@Pest_Hunter Yes you can. The bodypart (front, back bumper, skirt) can be tune, but the carbon part it will stay. (Because of my lack of knowledge to combine the carbon part with the bumper, sorry).
Tuning the exhaust will be a problem, it can be tuned but the changes are not visible. The model of the exhaust is inside the car (This actually to prevent from the game to crash).
And other tuning part works perfectly (paintjobs, spoilers, etc)