Valve Spring

Free Length (Approximately) 48.4 mm (1.905 inch)
Spring Tension (Valve Closed) 338 N ± 20 N @ 38.0 mm (75.98 lbs. ± 4.5 lbs. @ 1.496 inch)
Spring Tension (Valve Open) 607 N ± 30 N @ 29.75 mm (136 lbs. ± 7 @ 1.172 inch)
Number of Coils 7.82
Wire Diameter 3.86 mm (0.151 inch)
Installed Spring Height 38.00 mm (1.496 inch)