BTR DUAL SPRING KIT - .660" LIFT - SK001 (Steel Retainer)

They are designed to be used with stock rocker arms. If you go the roller rocker route, see part # SK002. This is a drop-in kit for 15° LS heads. It will also work with LS7 heads when used with a .045” shim (Part numbers SS015 +SS030). This kit will not fit LS9 engines. See part # SK006 for LS9 heads. The kit includes dual polished springs, locks, and your choice of: •Titanium or Chromoly Steel Retainers •Locators for Stock or Bronze Guides •Valve Seals Spring specs: •155 lbs @ 1.780" •380 lbs @ 1.180" •400 lbs @ 1.130 •Coil bind @ 1.070"