All Supertech valve springs are manufactured using premium Superclean Chrome Silicon Vanadium Steel alloy, engineered for high RPM durability and long-lasting performance. This premium alloy provides excellent structural memory, minimizing fatigue and helping your valvetrain maintain peak operation under stress.
Every Supertech valve spring is computer-designed to keep wire stress levels within the fatigue limits and control harmonics at high RPM. The dual spring configuration (inner + outer) is engineered to improve stability and harmonic damping for reliable valve control in demanding street and race applications.
This spring features a dual spring configuration designed to enhance valvetrain stability and reduce the risk of valve float at high RPM. Its specifications include a spring rate of 11.50lbs/mm, a free length of 45mm, a coil bind height of 20.70mm, an outer spring ID of 21.85mm, and inner spring dimensions of 20.50mm OD and 15.50mm ID.