Isky Cams RAD-9000 Precision Tool Room Dual Valve Springs w/ Damper - (Set of 16) - Outer: 1.650" O.D., 1.145 I.D. - Inner: 1.040" O.D., .740" I.D. Dzus Mounting Bracket Cast iron head

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Isky Cams RAD-9000 Precision Tool Room Dual Valve Springs w/ Damper - (Set of 16) - Outer: 1.650" O.D., 1.145 I.D. - Inner: 1.040" O.D., .740" I.D. Dzus Mounting Bracket Cast iron headIsky RAD 9000 Precision Tool Room Valve Spring taken one step further. Springs have undergone Radial Densification (RAD), which further modifies the springs' physical properties. Designed for endurance oval track racing, RAD 9000 springs are sold in sets of 16. Isky RAD 9000 Precision Tool Room Dual Valve Springs w Damper Outer: 1. 650" O. D. 1. 145 I. D. Inner: 1. 040" O. D. . 740" I. D. Seat Pressure 245 @ 2. 000" Open Pressure: 600 @ 1. 300" Rate