The Energy Suspension Rear Spring is an automotive must-have! Based on our own experience, this outstanding product has significantly improved our vehicle`s suspension. The reduction in body roll and improved handling are remarkable - we have attained exceptional performance on the road and track. The increased stiffness of the springs is impressive and has significantly improved our vehicle's aesthetics providing an aggressive yet polished finish. The only downside is that it can be a bit noisy, but that's not a deal-breaker considering the significant difference it has made. Overall, we highly recommend this product!