SuperTechAll Supertech valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher performance & durability at high rpms. Using high quality steel alloy also provides the added benefit of better structural memory for all of our springs.Computer designed valve springs to ensure that wire stress levels do not pass the limits defined in the Fatigue diagrams. They also utilize computer software that allows us to ensure that the harmonics are under control. This combined with our high quality steel alloy enables SuperTech valve springs to be more durable in extreme conditions, giving your performance racing engine a serious competitive advantage in both performance and durability.SuperTechs’ Cnc machined high quality military certified titanium alloy to ensure a tight fit. Our high quality retainers are among the best in the industry.Type: Beehive SpringOutSprBase.ID: 16.50mmOutSprBase.OD: 23.50mmOutSprTop.ID: 12.30mmOutSprTop.OD: 19.30mmPress.Open: 172 @ 10Press.Seat: 75 @ 33.50Max Lift: 11.3mmCoil Bind: 22.20mmRate: 9.70lbs./mmRetainer: OEM Retainer SS C202 KPR-5.5A-LG
