This very popular Spring Kit is highly recommended when upgrading to a aftermarket Camshaft

Spring kit for LS engines using stock rocker arms.  Included dual polished springs, matching Steel Retainers, locators for stock guides, locks and seals.

Spring specs are 155 lbs @ 1.780", 380 lbs @ 1.180", 400 lbs @ 1.130, coil bind @ 1.070"  This is a drop in spring kit for all 15 degree LS heads including LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA.