Abstract: A torsion bar attachment mechanism for indexingly attaching a torsion bar to a cross-member component of a frame of a motor vehicle so that a range of torsion bars may be attached to a single adjuster arm. An adjuster arm has a barrel receptacle for indexingly receiving therein an adjuster barrel. The adjuster barrel has at least one barrel tab upstanding at its outer surface, and the surface of the barrel receptacle has a plurality of receptacle notches formed therein each of which being configured for receiving the barrel tab. When the adjuster barrel is received into the barrel receptacle of the adjuster arm, the barrel tab is indexingly disposed into one position of a predetermined plurality of positions of the barrel receptacle, wherein each position is defined by a receptacle notch and corresponds to a particular torsion bar, of a selected range of torsion bars to be used respectively therewith.