Energy Suspension 7.18108G Hyper-Flex Master SetEnergy Suspension 7. 18108G Hyper Flex Master Set Energys Hyper Flex(TM) is superior performance polyurethane which has proven itself under the most demanding conditions on the race track, off road and street performance driving, Hyper Flex(TM) components do not wear or deteriorate from exposure to undercar chemicals such as oils and coolants and withstand atmospheric conditions like UV exposure and pollutants. Impervious to these elements, Energys