Supertech Valve Spring Dia 30/21.80mm / 80lb at 40.4mm / 180lb at 11.5mm Lift / CB 26mm - Single

Supertech is well-known for making performance engine components, and this single valve spring, part number SPR-H1020S, is a good example of their work. This spring is designed to handle specific lift and pressure requirements, offering 80 pounds of force at 40.4mm installed height and 180 pounds of force at 11.5mm lift. It has a diameter of 30mm on the outside and 21.80mm on the inside, with a coil bind height of 26mm.

This type of spring is often used in engine builds where precise valve control is important, especially at higher RPMs. The specifications indicate it's built for applications that demand more than stock valve spring performance. When installing, ensure you have the correct tools to compress the spring safely and accurately set the installed height to achieve the intended seat pressure.