NEW Lunati Extreme Series Dual Valve Springs 74740-16  
 
Designed for the professional drag or Circle Track racer, Lunati Extreme Series valve springs feature high-tech, super-clean, high-tensile chrome silicon wire construction. They undergo extra post-coil processing and chamfering. They have excellent fatigue life and almost zero load loss characteristics.
 
Outside Diameter of Outer Spring (in.):
1.620”
Coil Bind Height (in.):
1.170”
Spring Rate (lbs/in.):
585 lbs./in.
Inside Diameter of Inner Spring (in.):
0.636”
California Prop 65:
Warning: Cancer & reproductive harm. Ps65warnings.ca.gov