Mubea Automotive India Private Limited supplies Engine Valve Springs with High Fatigue Strength. Mubea Automotive India Private Limited has been awarded ISO 9001:2000 and 14001: 2000 certifications. Engine Valve Springs with High Fatigue Strength are cold-formed wire springs made of pure spring steel with the highest tensile strength. Engine Valve Springs with High Fatigue Strength is a highly stressed springs ensuring reliable valve closure with an optimum spring force. Each engine valve springs and auto coil springs is CNC coiled, stress relieved, ground, and shot-penned and heat set.