Standard Emulsion Jet, .000" Jet Size. Replacement emulsion jets for infinite tunability of the metering systems on the Ultra XP carburetors and the 0-80787-1 350CFM 2bbl. Click on Catalog Product Page for complete listing of jets and sizes.. Fits All Holley Ultra XP™ & Dominator® 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.
