blox racing Drag Pro Series Coilover EG/DC/EKEach BLOX Racing coilover system is designed with specifically matched spring rates and shock valving to offer enthusiasts unparalleled handling characteristics, while maintaining suitable ride comfort and quality. The Tuner Series is designed to meet the needs and demands of daily driving and high performance weekends at the local road course. The Competition Series is designed for the rigors of high performance road course driving and racing.