Hardrace 17mm Rear Add-On Sway BarSway Bar affects the handling and the car?? s over steer and under steer. It ties the lower suspension links together across the front or back, will keep your car flat in turns instead of leaning over to one sideHARDRACE sway bars provide better control especially at high speeds cornering . Hollow internal structure . Heat treated . Correction of under or oversteer . Improve more grip and better handling . Increased stability while during high speed