Isky Precision Tool Room valve springs have gone one step further. Springs have undergone Radial-Densification (RAD) to further modify the springs physical properties. Designed for endurance oval track racing, RAD-9000 springs are sold in sets of 16.
- Valve Spring Style:
 - Standard
 - Number of Springs Per Valve:
 - Dual
 - O.D. Outer Spring (in.):
 - 1.625 in.
 - Coil Bind Height (in.):
 - 1.180 in.
 - Damper Spring Included:
 - Yes
 - Spring Rate (lbs/in.):
 - 550 lbs./in.
 - I.D. of Outer Spring (in.):
 - N/A
 - I.D. of Inner Spring (in.):
 - 0.770 in.
 - Valve Springs Coated:
 - N/A
 - Maximum Valve Lift (in.):
 - 0.750 in.
 - Retainers Included:
 - N/A
 - Retainer Material:
 - N/A
 - Locks Included:
 - N/A
 - Lock Material:
 - N/A
 - Valve Stem Seals Included:
 - N/A
 - Installed Height:
 - N/A @ N/A
 - Open Height:
 - N/A @ N/A
 - Quantity:
 - Sold as a set of 16.