The Lexus Is carbon fiber trunk is light weight, as they are made up of materials like fiber glass and other materials which are lighter and harder. The Lexus Is carbon fiber trunk and the Lexus Is 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. The installation of the Lexus Is trunk is done through the factory mounting points or latches. Lexus Is carbon fiber trunk is a device mainly used for the looks as well as for expediency.