The Pacbrake Auto Momentary Shifter Switch Kit is a switch that is mounted on the shifter, providing easy access for exhaust brake activation and other vehicle accessories such as Pacbrake's air horns and auxiliary lights. The Switch-Pac is a perfect solution to control almost anything you wish, without the need for drilling a hole in the vehicle's dash. Its convenient fingertip control location makes accessory activation easy. Additionally, the sleek black finish of the switch matches the factory transmission gear lever and suits all interior colors.