Ferrea Toyota 3SGTE 249lbs Rate Inch Dual Valve Spring - Set of 16

Ferrea Valve Springs are developed from high strength alloys, including premium grade chrome silicon steel. These springs are heat-treated and stress relieved, which dramatically increases the spring’s life. Strict quality control procedures and cycle testing ensures consistency from batch to batch. Provides stability for high lift, high rpm racing engines. This spring is a dual spring, turbo, special alloy with an outside diameter of 20.8 mm/28 mm and an inside diameter of 16.51 mm/20.8. It has a seat pressure of 80 lbs @ 37.6 mm and an open pressure of 178 lbs @ 27.6 mm. The rate inch is 249 lbs, coil bind is 25.1 mm, and max net lift is 11.5 mm.