.660″ Lift Dual Spring Kit for LS engines using stock rocker arms. Includes dual polished springs, locks and your choice of:
Titanium or Chromoly Steel Retainers
Locators for Stock or Bronze Guides
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, etc, this kit will also fit LS7 heads with approximately .045″ of spring shim, see item SS015 and SS030.
This kit will not fit LS9 engines, please see item SK006 for LS9 heads.
THESE ARE FOR STOCK ROCKERS
.660″ Lift Platinum Spring Kit
SP001/SK001 springs are designed for use with stock rockers.
Heavier roller rockers require more spring pressure to maintain control of the valve train.
We recommend our SP002/SK002 for roller rocker applications.
Complete List of Kit Componets
SP001-1 .660″ Lift BTR Platinum Dual Valve Spring 16
SR001S-16 BTR Steel Retainers For Platinum and Extreme Springs, Set of 16 1
SL505045-16 BTR Spring Locators; .505″ ID, .045″ Thick, Set of 16 1
VS LS KIT BTR LS Valve Seal Kit; Set of 8 Black Intake Seals and 8 Brown Exhaust Seals 1
VL7?8MMBLK-32 BTR Black Oxide Coated Valve Locks; 1 Radial Groove, 7? Angle, 8mm, 16 Pairs 1