HR'street Performance SS Coil Overs feature polished stainless steel shock tubes. These Coil Overs are shock damping adjustable - allowing personalized tuning of the shock setting to suit driving needs for high performance or comfort. The fully threaded shock body allows for adjustable vehicle height. HR ride development engineers have precisely plotted the perfect shock damping curves of each application for optimized handling and superb ride comfort. To ensure the best quality available HR has partnered with world - renowned shock specialists, KONI, to manufacture these high quality shocks.