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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 …
Forum - Holley Performance Products Forums
Oct 24, 2025 · Forum 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 …
Sniper & A/C - Holley Performance Products Forums
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 …
Holley EFI Software HotKeys for Quick Keyboard Navigaton
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 …
Holley MPI Commander 950 Software
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 …
Revised Sniper 1 Downloads Page - Holley Performance Products …
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 …
Electric Fan setup on Sniper EFI - Holley Performance Products …
May 3, 2024 · So I’m attempting to set a Electric Fan on my Sniper, looking at the manual it says to hook the light blue wire to the relay ground trigger. I believe I have the relay setup properly, …
Terminator X EFI - Holley Performance Products Forums
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 …
Universal Terminator X - Holley Performance Products Forums
Jun 21, 2021 · I have the Holley 550-936 Terminator X Kit, and added CNP harness 558-307. Running Dual Sync on a Mark IV BBC.
Sniper EFI - Holley Performance Products Forums
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 …