Valve Spring
| Valve Spring Pressure Closed | 86 - 94 lbs. @ 1.808 inch |
| Valve Spring Pressure Open | 216 - 235 lbs. @ 1.338 inch |
| Valve Spring Installed Height | 1.808 - 1.838 inch |
| Valve Spring Free Length | 2.218 inch |
| Valve Head Diameter - Intake | 2.19 inch |
| Valve Head Diameter - Exhaust | 1.72 inch |
| Valve Stem Diameter - Intake | 0.3715 - 0.3722 inch |
| Valve Stem Diameter - Exhaust | 0.3713 - 0.3720 inch |
| Maximum Valve Spring Installed Height Shim (Service Only) | 0.030 inch |
| Maximum Valve Spring Tension Shim (Service Only) | 0.030 inch |
| Maximum Combined Valve Spring Installed Height and Valve Spring Tension Shim (Service Only - Shim Placed Under Valve Rotator Only) | 0.060 inch |