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Holley Vacuum Secondary Spring Kits

4.8 out of 5 stars 49 Customer Reviews

These Holley vacuum secondary spring kits are designed to fine-tune your carburetor. They have an effect on initial operating and full upper rpm.

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Holley Vacuum Secondary Spring Kits 20-13

Vacuum Secondary Springs, Road, Speed, Mighty Demon, Holley 4150/4160 Carburetors,7-piece, Set

Part Number: HLY-20-13

4.8 out of 5 stars ( 49 )

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