Valve Springs

Free Length [20]
Pressure [9]
Out Of Square Limit [10]

[09] -- Intake, 46 - 52 lbs. @ 1.535 inch; exhaust, 29 - 33 lbs. @ 1.476 inch.
[10] -- Intake, 0.063 inch; exhaust, 0.060 inch.
[20] -- Intake, 1.815 inch; exhaust, 1.717 inch.