LS Premium .660" Polished Double Spring Set of 16

LS Premium .660" Polished Double Spring Set. This valve spring is excellent for high performance or racing use for up to .660" lift using stock rocker arms. This spring set requires matching retainers, valve locks, springs seats and valve seals. Check out our spring kit section for complete valve spring kits.

Spring specs:

Outer Spring Diameter 1.295" O.D.
Install at 1.780" for 160 lbs seat pressure
Open Pressure 425 lbs at 1.150"
Open Pressure 435 lbs at 1.130"
Coil Bind at 1.070"