Holley Vacuum Secondary Spring Kit Carburetors 4150 4160 4500
Holley Vacuum Secondary Spring Kit Carburetors 4150 4160 4500
Vacuum Secondary Springs, Road, Speed, Mighty Demon, Holley 4150/4160/4500 Carburetors, Set of 7
These Holley vacuum secondary spring kits are designed to fine-tune your carburetor. They have an effect on initial operating and full upper rpm