Front Spring Rate: 10.0 kgf/mm Rear Spring Rate: 9.0 kgf/mm The three existing MAX IV GT series becomes the HIPERMAX S starting in 2021. 9 years have passed since the launch of MAX IV GT, and during that time HKS has developed new technologies. It will be a new series that has all three conventional models characteristics, and been evolved by damping force characteristics, durability, and beauty. The HIPERMAX S series offers the best ride so far in HKS suspension history. HIPERMAX S Technical Features: Dual PVS We evolved the existing preload valve system to the dual preload valve system to suppress the generation of unnecessary damping force during higher piston speeds. This provides major improvement in ride comfort without affecting the driving performance. Wide range damping force adjustment mechanism The improved shape of the Needle jet expands the range of damping force adjustment. This makes is possible to handle driving on a wider range of stages. Evolution of Bump stop rubber A new shape of bump stop rubber reduces the body roll and achieves ride comfort at the same time which cannot be achieved with general hydro bump stop rubber. Low friction technology With advanced tribology technology, we have achieved even higher durability and lower friction than conventional products. This technology contributes to improved ride quality and handling performance. 3-year warranty Compared to the one-year warranty period of the conventional MAX IV GT series, the HIPERMAX S Series has a three-year warranty due to optimized internal parts and quality improvement. Note: Image is generic and may differ depending on application. Coilover set will come as a set of 4 Coilovers