The standard rear suspension has a very low torsional stiffness. This causes the understeer of the vehicle, thus limiting the performance. This kit allows to increase the rigidity of the system making the attitude of the vehicle much more "flat" and much more responsive to changes of direction. The torsion bar is adjustable and allows to obtain more or less oversteering, depending on driving style and on circuit characteristic. The kit consists of a torsion bar made in special spring steel, adjustable in 3 positions and two sets of stainless steel tie rods fitted on motorsport derived uniball (which generally no one provides) and supports fitted with Nylon loaded with zero backlash bearings, the only one on the market, and finally two Ergal from billet support and bracket for connecting the kit to the rear suspension axle.