Whether you are racing your car on weekends or racing to work during the week you need to know when to shift up to the next gear. You cannot always rely on your ears to tell you when to shift. If you are on the track and you cannot take your eyes off the asphalt for a split second. An Autometer Shift Light uses advanced micro circuitry to let you know the perfect point when to shift to the next gear. You can calibrate the shift control unit by inserting a module into the unit that is programmed at the precise RPM where shifting to the next gear is at the optimum. When your engine reaches that exact RPM, the shift control unit illuminates, you shift. The Autometer Shift Light is designed to be used with all standard, electronic and Vertex ignitions and installs right on your dashboard and is always in plain sight. Shift lights come in a wide range of desired RPM points. Whether you want to set the shift point from 4000 to 4800 RPMs or anywhere between 10,000 and 10,800 RPMs, there is a shift control unit for you. Make an Autometer Shift Light a part of your car. Motor hobbyists certainly deserve high quality sales assistance when considering high-quality auto parts for a car or truck. For our valued customers, we make available a twenty-four hour a day help hotline to support you with your calls. Everyone hates paying for shipping, so we always offer completely free shipping for every order greater than $50. If you spot a better price somewhere else, let us know - we always beat any legitimate auto part price.