HARDRACE Rear Sub-frame Brace are designed to stiffen up the chassis and reduce vehicle chassis flex. This will increase the rigidity of your car during high speed driving and hard cornering. This is why HARDRACE Rear Sub-frame Brace can maximizes the performance of the suspension and brings better handling feeling and quicker response. . 6061 T6 Aluminum lightweight design . Reduce the chassis flex . Increase the rigidity