LS .570" Single Beehive Valve Spring Set. This valve spring set is a performance replacement for stock LS valve springs including the "blue spring" and "yellow spring" using your stock factory seats, seals, retainers and locks. These springs are a good choice for stock replacement and street performance usage with stock rockers arms up to .570" lift.
Outer Spring Diameter 1.260" O.D.
Install at 1.800" for 104 lbs seat pressure
Open Pressure 270 lbs at 1.210"
Coil Bind at 1.150"