660" Dual Valve Springs Kit Compatible with GM LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA Replace 12499224 12625033 12589774 12621428 (Steel)

660" Dual Valve Springs Kit

• Compatibility: Compatible with all 15 degree LS heads including LS1 LS2 LS3 LS4 LS6 L76 L92 L99 LQ4 LQ9 L33 LSA(Does not fit LS7 or LS9).
• Replacement part number: SK001 SK001S 12499224 12625033 12589774 12621428. 660" Lift dual spring kit compatible with LS engines using stock rocker arms.
• High-quality materials: The spring is made of 55CrSi spring steel with international standards, which has high strength, elasticity and hardenability, is strong and durable, and can be used for a long time. The base is made of 40Cr steel, which has a long service life.
• High standards: We use strict production standards and advanced production technology to make, after the product is made, it will go through a series of tests to ensure that it can be used normally and for a long time, please feel free to buy.
• Package Includes: 16 x 660 Lift Dual Valve Spring; 16 xSteel Retainers; 16 xSpring Locators for stock guides; 16 xValve Stem Seal Set; 32 x Locks .