OS Giken Steel SP Clutch series is an ideal choice as a replacement to the original equipment clutch and flywheel. It provides quicker response and higher performance for OEM Power and light engine tuning in mind. This clutch series was designed ideally for class restrictions for allowable engine modifications. The [SP Single Steel] - SuperSingle Clutch is designed with the same high-quality materials and strict manufacturing processes as our Racing Multi-plate Clutch line.