LS-Series Dual Valve Spring Kit (.660″ Lift) with Steel Retainers – Compatible with 4.8L/5.3L/6.0L, LS1/LS2/LS3

Description

LS .660″ Dual Valve Spring Kit with Steel Retainers for 4.8, 5.3, 6.0, LS1, LS2, LS3 – SK001

This .660″ dual valve spring kit is engineered for LS engines utilizing stock rocker arms. The kit includes dual polished springs, chromoly steel retainers, and components designed for compatibility with 15 degree LS cylinder heads. It is suitable for Gen III/IV applications and features a dual spring style with a maximum lift of .660 inches.

Key Features

• .660″ maximum lift dual valve spring kit
• Designed for use with stock rocker arms
• Dual polished springs
• Chromoly steel retainers
• Locators for stock guides (.505″ ID / .060″ thick)
• Black valve seals
• Spring pressure: 155 lbs @ 1.780″, 380 lbs @ 1.180″, 400 lbs @ 1.130″
• Coil bind at 1.070″
• Part type: Valve spring kit
• Engine type: Gen III/IV
• Style: Dual

What’s Included

• Dual polished valve springs
• Chromoly steel retainers
• Locators for stock guides (.505″ ID / .060″ thick)
• Black valve seals
• Locks

Vehicle Fitment

This kit is intended for all 15 degree LS cylinder heads, including LS1, LS2, LS3, LS4, LS6, L76, L92, L99, LQ4, LQ9, L33, LSA, and similar Gen III/IV applications. It will also fit LS7 heads with approximately .045″ of spring shim (part numbers SS015 and SS030). Not compatible with LS9 engines; for LS9 heads, use part number SK006.

Installation Notes

• Drop-in installation for 15 degree LS heads
• For LS7 heads, approximately .045″ of spring shim is required (part numbers SS015 and SS030)
• Not compatible with LS9 engines

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