At Underground autostyling inc., talented technicians customize cars, trucks, SUVs, and even boats with high-tech sound systems, satellite navigation, and sleek ceramic window tinting. Techs use high-quality Viper film to prevent infrared heat and UV radiation from damaging upholstery, and their back-up cameras make it easier to test the theory that gas mileage improves when driving in reverse. Underground's crew also affixes iPads to radio consoles, allowing easy access to directions and music, and rigs cars with remote-start systems that let you get the interior good and air-conditioned with the press of a smartphone button.