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Technical Request

Welcome to the Technical Services E-mail System. To provide you with the most accurate and timely answers to your technical questions, please fill out the technical information section below. Please fill out the form as completely as possible. This will allow the techs to properly answer your questions without any delay.

For any carburetor questions, you must provide the list number of the carb off the air horn or body. Instruction sheets for many products can be downloaded free, and the Support Section contains a wealth of information. Please keep in mind that some questions may better be answered over the phone. Please direct these to our Tech Service phone lines at:


Toll Free 1-866-464-6553 between 8am and 5PM (Central Time) Monday through Friday, and between 8am and 2pm on Saturday.

Additionally, head over to for new and updated technical information from Holley.

Please allow up to two business days for an answer, and thank you for your business!

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