Valve Spring: Specifications

Valve Springs
Free Length 40.4 mm (1.591 inch)
Force Required to Compress (Valve Closed) 205 Nm @ 30.3 mm (46 lbs. @ 1.19 inch)
Force Required to Compress (Valve Open) 409 Nm @ 21.7 mm (92 lbs. @ 0.854 inch)
Installed Height 30.3 mm (1.19 inch)