Aftermarket Shop, and can be bought for either In-game Cash or SpeedBoost, depending on model. Most of the hoods have a standard and a carbon fiber variation. Like spoilers, standard hoods can be customized in the paint shop, but carbon fiber hoods cannot be changed color. Note that hoods are only a visual upgrade. Hoods do not affect car performance.
Buying or removing hoods individually is possible since November 27th, 2012.