H&R Street Performance Coilovers increase handling on the street. They are also great for AutoX and Track Days. H&R coil overs offer Unrivaled comfort, performance and are engineered for street use. Unlike traditional twin-tube shock absorbers, H&R Coil Overs feature a state-of-the-art mono-tube gas shock construction. Combined with the knowledge and skill of H&R’s suspension engineers, the use of this state-of-the-art technology results in the best suspension product that you can buy for your vehicle.