"SP" Series Dual Valve Springs with Damper (16) 1.550" OD ISK9365-SP Product:225LBS @ 1.950" Seat Pressure, 550LBS @ 1.270" Open Pressure, 1.170" Year after year

Year after year

The Coil utilises an iron U-Core design with a segmented bobbin for improved voltage distribution

The Triple X rotor provides long life and excellent wear and tear

Short version

"SP" Series Dual Valve Springs with Damper (16) 1.550" OD ISK9365-SP Product:225LBS @ 1.950" Seat Pressure, 550LBS @ 1.270" Open Pressure, 1.170" Year after year"SP" Series Dual Valve Springs with Damper (16) 1. 550" OD225LBS @ 1. 950" Seat Pressure, 550LBS @ 1. 270" Open Pressure, 1. 170" Coil Bind ISK9365 SP K9365 SP The "SP" series utilises "Hi Tensile" Chrome Silicon outer material. For applications with radical cams and or moderately high rpm, where traditional chrome silicon springs prove inadequate, the "SP" series is the next highest level of endurance. All "SP" series springs are Spintron Test Proven