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The Holley 20-13 Secondary Diaphragm Spring Kit provides precise tuning control for vacuum-operated secondary carburetors. This spring kit allows you to adjust the rate at which the secondary throttle plates open, optimizing performance for different engine combinations and driving conditions.
Key Features:
By selecting the appropriate spring tension, you can control how quickly or gradually the secondaries open under acceleration. Lighter springs allow quicker secondary opening for high-performance applications, while heavier springs provide more gradual opening for improved drivability and fuel economy in street applications.
No
Holley
Air and Fuel Delivery
Assorted
5
Performance
Steel
Carburetor Accelerator Pump Spring
Vacuum Spring Assortment
7
Hardware, Fasteners and Fittings
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Donald Vaughan
great God Bless
Rodney Wilbanks
Found it quickly & a good price.
Darryl Winslow
Great company..Great communication..Fast shipping. A+++++++++++++++.<br>Will do business again.
jg1418
Excellent web page. Good prices. Your link for paying with Amazon is excellent. Fast delivery.
Jose Martinez
Fast shipping , product just as described, and quality product.
Cpcurt4719
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