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How to Find Model Numbers on Holley Carbs

Holley is one of the leading manufacturers of aftermarket performance carburetors in the United States. Holley carburetors come in a variety of different designs and functions, and you can purchase upgrades to your existing carburetor to make it work more efficiently in your vehicle. You will need to know the model number, otherwise known as the list number, of your Holley carb to order new parts for it from Holley and other aftermarket parts manufacturers. Holley uses the list number to identify their carburetors.

Instructions

1

Look at the right side of your carburetors choke air horn. You should see two numbers there, the top one is your List number and the bottom one is the date code location. The list number will begin with an R and consist of 6 to 8 digits. This is the number you need.

2

Look for the list number on the top of the main body casting if your carburetor does not feature a choke air horn. If your list number is on the main body casting, your carburetor is probably a model 4500.

3

Look up the list number on Holleys carburetor parts list. (See Resources.) You will find the model number in the column next to the list number.