Neu-F Torque Arm Insert 2012-2016 Fiat 500 Turbo / Abarth (28mm)The Fiat 500 turbo Abarth's rear suspension does not have a common 'sway bar' because, technically, no part of it is connected to the subframe. We call this a torsion bar because it works by countering any twisting motion on Fiat's rear axle beam (and not independent) suspension. Under hard acceleration, especially during boosting on turbo Fiats, the entire engine and transmission rock forward and backward. The motion is limited by factory 'torque