Description
HOLLEY VACUUM SECONDARY WITH BALANCE TUBES for 2×4 application like Holley tunnel ram carburetors.
These give you the ability to tune the timing point of the secondary opening by just changing the secondary spring. The balance tubes are to be connected by a vacuum hose,that comes with your purchase, so that the secondary on both carburetors in a 2×4 application open at the same rate. THESE ARE SOLD AS A SET
Available in Classic Gold or Bright Zinc.
