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Valve Spring

GENERAL:
Approximate Free Length 47.65 mm (1.876 inch)
Inside Diameter 21.00 - 21.51 mm (0.827 - 0.847 inch)
Installed Height 41.656 mm (1.640 inch)

SPRING TENSION-VALVE:
Closed 271 - 307 N @ 41.656 mm (61 - 69 lbs @ 1.64 inch)
Open 818.5 - 871.9 N @ 30.89 mm (184 - 196 lbs @ 1.216 inch)