The Kia Optima carbon fiber trunk is light weight, as they are made up of materials like fiber glass and other materials which are lighter and harder. Perversely the Kia Optima carbon fiber trunk and the Kia Optima carbon fiber hatch are too light weight, as they are manufactured using the substances like fiber glass and other materials which are lighter and tougher. It is a device mainly used for the looks as well as for expediency. The installation of the Kia Optima trunk is done through the factory mounting points or latches.