Holley(R) is a registered trademark of Holley Performance Products. Demon(R) is a registered trademark of Demon Fuel Systems, Inc. Quick Fuel(R) is a registered trademark of Quick Fuel Technology, Inc. Viton(R) is a registered trademark of Dupont Performance Elastomers. All other trademarks are property of their respective owners.
Vacuum secondary spring kit. Includes 7 springs. Fits Holley® 4150; 4150hp; 4160 series and various Demon® carburetors.