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Vacuum Secondary Spring Kit. The Edelbrock 1957-79 Ford Truck Edelbrock 12412 Vacuum Secondary Spring Kit for Holley 4150, 4150HP, and 4160 carburetors is designed to provide seven different spring options for tuning vacuum secondary carburetors. This kit allows users to customize the vacuum spring tension for precise secondary actuation, improving throttle response and overall performance. Proper spring selection is essential for optimizing drivability and fuel delivery.
_x000D__x000D_Construction and Appearance. The springs are made from durable steel with a natural metal finish that emphasizes strength and corrosion resistance. Each spring is engineered to meet the specific tension requirements for various carburetor models.
_x000D__x000D_Installation. Installation is straightforward for those familiar with carburetor tuning and requires no drilling or modification. This kit serves as a direct replacement for existing vacuum secondary springs, making upgrades or replacements simple and efficient.
_x000D__x000D_Warranty. This spring kit is backed by a 12-month warranty, ensuring product quality and reliability.
_x000D__x000D_Application. Fits Holley 4150, 4150HP, 4160 series carburetors and various Demon carburetors, including Demon King, Mighty, Race, Road, Sea, Speed, and Barry Grant Claw Series. Not compatible with E85 or oxygenated fuels.
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov