Valve Spring

GENERAL:
Free Length (Approximately) 47.65 mm (1.876 inch)
Inside Diameter 21.0 mm - 21.51 mm (0.827 - 0.847 inch)

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