.660" Lift Spring Kit

LS1 .660" Dual Valve Spring Kit with Steel Retainers

.660" Lift Dual Spring Kit for LS engines using stock rockers.

Complete Kit includes dual valve springs, locks and the following:
Chromoly Steel Retainers
Locators for stock Guides (.505" ID/.060" Thick)
Blue or Black valve seals
Valve locks

Spring specs are:
155lbs @ 1.780"
380lbs @ 1.180"
400lbs @ 1.130"
Coil bind @ 1.080"

.660"Dual Valve Spring Kit