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Vacuum Secondary Spring Kit. The Edelbrock 12412 Vacuum Secondary Spring Kit for 4150, 4150HP, and 4160-Style carburetors includes seven carefully selected springs designed to regulate the vacuum secondary throttle opening. This kit allows enthusiasts and technicians to customize the carburetor’s performance characteristics, ensuring optimized throttle response and improved drivability across various applications.
_x000D__x000D_Material Quality And Durability. Constructed from high-quality steel, each spring in the kit offers excellent tensile strength and long-lasting durability. The steel springs are designed specifically for automotive use, providing reliable performance under different operating conditions. This kit is not compatible with E85 or oxygenated fuels.
_x000D__x000D_Installation. Installation is straightforward for users familiar with carburetor components, requiring no drilling or specialized modifications. This makes it an accessible upgrade for professional mechanics and serious enthusiasts alike.
_x000D__x000D_Warranty. The product is backed by a 12-month warranty to ensure confidence in quality and performance.
_x000D__x000D_Application. Specifically designed to fit Holley 4150, 4150HP, 4160 series, and various Demon carburetors. Fits 55-57 150, 210, Bel Air, and Nomad models.
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