Abstract: An adaptor having a base plate adapted to fit on an accelerator pedal of a vehicle has an operating plate with upper and lower portions thereon. The operating plate is elevationally and adjustably mounted on the base plate. A lateral integral projection extends outwardly from the lower portion of the operating plate. The adaptor is removably attached to the accelerator pedal which facilitates the positioning of the toe and heel of the same foot of the user on the operating plate for controlling the braking and acceleration of the vehicle without lifting or moving the foot from one pedal to the other. The use of the adaptor permits a conventional manual transmission vehicle to be converted for stock car racing. In an alternative embodiment, the accelerator pedal per se replaces the base and the adaptor is directly attached to the accelerator pedal.