Valve Spring

FREE LENGTH (APPROXIMATE):
Inner 48.59 mm (1.913 inch)
Outer 50.24 mm (1.978 inch)

SPRING TENSION (VALVE CLOSED):
Inner 169 - 187 N @ 38.33 mm (38 - 42 lbs. @ 1.509 inch)
Outer 271 - 289 N @ 43.41 mm (61 - 65 lbs. @ 1.709 inch)

SPRING TENSION (VALVE OPEN):
Inner 427 - 463 N @ 24.99 mm (96 - 104 lbs. @ 0.984 inch)
Outer 854 - 925 N @ 30.07 mm (192 - 208 lbs. @ 1.184 inch)

VALVE SPRINGS NUMBER OF COILS:
Inner 6.9 Left Hand Twist
Outer 5.5 Right Hand Twist

WIRE DIAMETER
Inner 3.35 mm (0.132 inch)
Outer 4.88 mm (0.192 inch)

INSTALLED HEIGHT (SPRING SEAT TO BOTTOM OF RETAINER):
Inner 37.01 mm (1.457 inch)
Outer 42.09 mm (1.657 inch)