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From classic restorations to modern modifications, the world-famous Holley Technical Service team has the answers you need. We provide support for all Holley customers with topics including compatibility, applications and suggestions.


Find information about your Holley Brand Product in this easy to use search. Just type in your part number to download.


Browse our technical documentation and general guides for information like carburetor exploded views and list numbers, NOS nitrous oxide setups, cam shaft, crank shaft and connecting rods and valve train information.


Be sure and visit our frequently asked questions section for quick answers on carburetor tuning, blower setup, fuel injection setup, intake manifold concerns, general cam shaft questions, and NOS performance.


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Lost or misplaced your warranty claim tag? Click above to print out a replacement warranty claim tag.


Holley stands by the name of all of our performance brands.


If you have questions about our products, need a part recommendation, or just cant seem to find what you need you can contact our Tech Support online and receive answers by e-mail.
Requests may be submitted at any time but please allow up to 48 hours for responses. All questions are answered in the order in which they are received.

Holley Performance Products provides award-winning technical support via phone Monday through Friday, 8AM to 5PM CST @ 270 781-9741.

Earls Performance Plumbing technical support is availible by phone Monday through Friday 10AM to 7PM CST @ 310 609-1602.