Oct 24, 2025 · To start viewing messages, select the forum that you want to visit from the selection below. Please be aware that this is a community forum. Although Holley employees …

Oct 24, 2025 · Home DescriptionIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to …

Feb 3, 2018 · The Holley Terminator, HP & Dominator EFI V5 EFI software/ECU firmware finally added an A/C activated option for the electric fans. The Holley Terminator X/X Max EFI V2 EFI …

Oct 31, 2015 · Holley EFI Software HotKeys for Quick Keyboard Navigaton 10-31-2015, 11:50 AM Several people have asked me if there were any Hot Keys in the EFI software, to make …

Jan 11, 2024 · Holley have revised the EFI software/support download page and now have two sections: Sniper 1 version 1.3 Build 50 files and Sniper 1 version 2 files. As stated, the version …

Holley 534-191 Commander 950 Pro Software Upgrade is what you need. This includes a certificate for sending your C950 ECU to Holley for the firmware update. The firmware in your …

Aug 15, 2025 · Terminator X EFI Tuning & TechIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the …

Oct 22, 2024 · Sniper EFI Tuning & TechIf this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link …

Jan 9, 2023 · Please be aware that this is a community forum. Although Holley employees will take part in answering questions from time to time, your questions may or may not be …

Nov 6, 2015 · Although Holley employees will take part in answering questions from time to time, your questions may or may not be answered by Holley personnel. Thus, Holley can not …