Hr street performance coil overs are the suspension solution for discerning drivers from daily drivers to serious tuners can appreciate the awesome handling and superb ride comfort. Hr is the originator of the true coil over system for the street. Each custom valved shock is tuned with a precision-engineered progressive rate spring to create a finely tuned suspension system. The fully threaded shock body allows for adjustable vehicle lowering to where you want. This feature helps balance vehicle weight, resulting in a lower center of gravity and improved performance and control. This set disables pasm.