Abstract: A tooling and procedure for installing a plurality of throttle plates onto a single throttle shaft all at the same time, using arbors/plungers secured to a tool holder, each of the arbors having a lower face surface with a suction provision for retaining a throttle plate against it for transport into one of several bores in a throttle body while allowing the throttle plates to be aligned with and attached to a flat on the throttle shaft. Limited lateral movement between the arbors/plungers provides for independent centering of each arbor/plunger relative to its bore, allowing simultaneous installation of a number of throttle plates.