Isky Cams RAD-9000 Precision Tool Room Dual Valve Springs w/ Damper - (Set of 16) - Outer: 1.600" O.D., 1.150 I.D. - Inner: 1.040" O.D., .745" I.D. 3552024-23- L features (3) 3/8"-16 accessory threads

features (3) 3/8"-16 accessory threads and weighs just one pound

we have a system to add even more power and better fuel economy

60 in Long

hassle free installation

2400-2800 RPM Stall

Isky Cams RAD-9000 Precision Tool Room Dual Valve Springs w/ Damper - (Set of 16) - Outer: 1.600" O.D., 1.150 I.D. - Inner: 1.040" O.D., .745" I.D. 3552024-23- L features (3) 3/8"-16 accessory threadsIsky 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. 600" O. D. 1. 150 I. D. Inner: 1. 040" O. D. . 745" I. D. Seat Pressure 250 @ 2. 050" Open Pressure: 735 @ 1. 250" Rate