Neu-F Rear Torsion Bar 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. Neu F 28mm rear torsion bar is the perfect upgrade from the 22mm stock diameter bar. Its diameter has enough size jump to actually make a difference and keep the back end