| Price is for one jet. Holley jets. In addition to Holley, these jets can be used on some of the early Autolite 4100 carburetors as well as the early Motorcraft 2100 carburetors and the Holley 1904 1 barrel carburetors. The later (after 1963) Motorcraft 2100 & 4100 use this jet. Includes the Holley 2100, 2 barrel carburetor Dos not fit the 2280, or 6280 2 barrel. Threaded end: 1/4" Don't ruin your engine. Printed specifications for jets were printed many years before the introduction of ethanol so you need to use trial & error to get the correct jet size. Test by looking at your spark plugs. Gray burning plugs are good, black is too rich, white is too lean. Change 1, or 2 jets sizes and repeat the test. These jet sizes assume 0-5000 feet in elevation. For 5000-10000 reduce by 2, for 10000-15000 reduce by 4. Some Holley jets were marked using 3 digits. Example 630 would equate to .063 in our list. Also fits these Holley carburetors. 94 847 1904 1920 1940 2100 4000 4150 4160 |
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