Abstract: A multi-function, composite apparatus for mounting on a drag racing vehicle is described which includes: (i) a terminal panel having leads coupled to various vehicle control components of the vehicle to affect operation of the vehicle; (ii) a display means to depict a plurality of different racing indicia selectable by a user wherein at least one of said indicia relates to vehicle performance during racing such as delay box timers, throttle stop controllers, cross over delay timers, etc. and a second indicia relating to a non-racing function such as driver reaction time tester or race playback function; and (iii) a keypad having a plurality of user-operable keys including function keys to control what indicia is shown on the display means and data input keys to modify the data in the apparatus. All required outputs can be shown on a single visual display means.