H&R Non-Adjustable Rear Sway Bar For BMW G20 M340i RWD and XDrive | 71462H&R Non Adjustable Rear Sway Bar For BMW G20 M340i RWD & XDrive Part # 71462 Dial in oversteer and understeer to your ideal handling specifications H&R Sway Bars are the perfect compliment to H&R Springs Coil Overs Performance Shocks and Cup Kits. Designed to reduce body roll, increase lateral stiffness, and improve handling. H&R Sway Bars are bent on proprietary machines designed by H&R that seamlessly produce beautiful complex curves making H&R Sway