Valve Spring: Specifications

Free Length (Approx.) Intake 43.675 mm (1.7195 inch)
Free Length (Approx.) Exhaust 44.319 mm (1.7448 inch)
Spring Force (Valve Closed) Intake 309 - 358 N @ 38.0 mm (69.5 - 80.5 lbs. @ 1.4961 inch)
Spring Force (Valve Closed) Exhaust. 249 - 285 N @ 38.0 mm (56.0 - 64.0 lbs. @ 1.4961 inch)
Spring Force (Valve Open) Intake 836 - 907 N @ 29.45 mm (188.0 - 204 lbs. @ 1.1594 inch)
Spring Force (Valve Open) Exhaust 552 - 605 N @ 31.47 mm (124 - 136 lbs. @ 1.239 inch)
Number of Coils Intake (Approx.) 6.86
Number of Coils Exhaust (Approx.) 7.66
Color of Spring (Top of Coils)
Intake (Right Hand Coil Direction) Orange
Exhaust (Left Hand Coil Direction) Green
Wire Diameter Intake 4.29 - 4.35 mm (0.1689 - 0.1712 inch)
Wire Diameter Exhaust 4.09 - 4.15 mm (0.1608 - 0.1632 inch)
Installed Height (Spring Seat to Bottom of Retainer)
Intake and Exhaust 38.0 mm (1.4961 inch)