Combo Kit for Aftermarket Radio Installation in Factory Radio Location. Radio Kit, Radio Wire Harness, and Antenna Adapter. Use to add an aftermarket radio to the factory vehicle wiring. Standard wire coloring usually will connect color for color to aftermarket radio's wire harness. Gray color radio kit. Designed specifically for the installation of Single or Double-DIN radios. High-grade ABS plastic. Contoured textured and painted to compliment factory dash. Some radios will require the inside of the radio kit to be sanded/filed to make the opening a little bigger- that's normal stuff especially if the radio is an off-brand since they sometimes don't design their radios by standard Din specs.