A throttle body and bracket assembly permits the joining of the bracket to the throttle body without fasteners by incorporating preselected and complementary geometries on a mating portion of the bracket and on a portion of the throttle body. These mating portions, which may be in the form of a dovetail-type configuration, may be fit together in locking fashion, and the bracket may be further held in place by securing a lip or retainer portion of the bracket between the free ends of the air hose and the throttle body when they are joined. Additionally, a throttle body may be molded to include an idle air by-pass passage having an open, exterior surface that is sealed by the mating portion of the bracket when it is placed in its mated position with the throttle body.