BTR .660 Lift LS Dual Valve Springs Kit GM LS6 LS2 LS3 SK001 - Titanium / Bronze Guide .565" x .060" thick

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BTR SK001 Valve Springs are the most common dual spring for LS. They are popular for most high-lift LS camshafts. You may want to upgrade your rocker trunnions when doing these springs due to the added pressure. Whether you’re putting together a daily driver with a mild cam, a 600 hp N/A stroker, or a turbocharged 1000 hp brawler, this BTR Platinum Spring Kit will make sure your valves are right where your cam wants them to be at all times. They are designed to be used with stock rocker arms.  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 cylinder 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 are as follows: •155 lbs @ 1.780" •380 lbs @ 1.180" •400 lbs @ 1.130 •Coil bind @ 1.070"