High-performance dual-spring kit featuring .660″ installed height, hardened steel springs, and lightweight titanium retainers—compatible with LS1, LS2, LS3, LS4, LS6, LQ4, LQ9, L33, L76, L92, L99, LSA, and other GM LS-based engines in Chevrolet Camaro and Corvette applications

Description

.660″ Dual Valve Spring Kit Steel Retainers 4.8 5.3 6.0 LS1 LS2 LS3
.660″ Lift Dual Spring Kit for LS engines using stock rocker arms. 
Kits ship standard with dual polished springs, locks and the following:

• Chromoly Steel Retainers
• Locators for Stock Guides (.505″ ID/.060″ Thick) 
• Black Valve 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, etc, this kit will also fit LS7 heads with approximately .045″ of spring shim (part numbers SS015 and SS030).
This kit will NOT fit LS9 engines, please use part number SK006 for LS9 heads.  
Part Type: Valve Spring KitEngine Type:   Gen III/IVMax Lift:          .660″Style:               Dual

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