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Crower 4.6L/5.4L 4V Modular Valve Spring Kit with Titanium Retainers Engineered Component Kit:
Spring pressure:
Seat: 1.420" @100 lbs
Nose: 0.910" @ 244 lbs
Coil bind: 0.850"
(No machine work required).
SKU:YOK-110132715