Fits: 4150/4160, Holley Carbs
Vacuum Secondary Springs, Steel, Carburetors, Set of 7
Vacuum Secondary Spring Material:
Sold as a set of 7.
Vacuum secondary carburetors are designed for universal installation on varying engine sizes and power levels. In turn, great improvements can be made by tailoring the secondary opening rate to your specific engine combo. These AED vacuum secondary spring tuning kits are designed to upgrade and fine-tune your vacuum secondary carburetor, resulting in overall better engine performance.