Holley 142-39 - Holley Emulsion Jets
Holley #510-142-39Hole Size - .039'' |
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Replacement emulsion Jets for infinite tunability of the metering systems on the Ultra HP Carburetors. For All Holley Ultra HP & Dominator HP Billet Metering Blocks. Holley does not recommend changing emulsion Jets unless you are a competent carburetor tuner and have the correct test equipment to record the changes.
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