HOLLEY CARBURETTOR VACUUM SECONDARY DIAPHRAGM SPRING KIT P/N 20-13
HOLLEY CARBURETTOR VACUUM SECONDARY DIAPHRAGM SPRING KIT P/N 20-13 Kit has been opened (approximately 25 years old) however is unused - the original packaging and instruction sheet show age from years of storage. Includes 7 springs,installation instructions and original packaging in condition as pictured. These Holley vacuum secondary spring kits are designed to fine-tune your carburetor. They have an effect on initial operating and full upper rpm. Pickup from Campbelltown NSW 2560 approxi