<img src="//images.holley.com/forum_brand_holleyefi.png" …
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 will take part in …
Forum - Holley Performance Products Forums
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 proceed. To start viewing …
V2 EFI software upgrade on Gen 1. - Holley Performance Products …
Jun 12, 2024 · I just noticed that the V2 EFI software supports both Sniper 1 & 2, but I saw the note in the overview that say call Holley because V1.3 needs a special update. Is the update worth doing …
Dominator EFI - Holley Performance Products Forums
May 29, 2025 · Dominator 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 above to …
Engine stalls after a few seconds. - Holley Performance Products Forums
Jan 9, 2023 · 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 guarantee an …
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 2 Firmware Update - Holley Performance Products Forums
Aug 24, 2024 · Hi. I have a Sniper 2 model 550-510 with a Sniper Transmission Controller. It appears to have had an older firmware version 102 since these were the file folders on the SD card. I followed …
Brushless PWM Fans - Holley Performance Products Forums
Jul 25, 2023 · This thread is a pictorial summary of my use of SPAL Brushless cooling fans with Holley EFI, and linked from andrewb70 topic on same concept using larger, single GM OEM SPAL …
Revised Sniper 1 Downloads Page - Holley Performance Products Forums
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 2 files (EFI …
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 register link above to …