Ignitions and Electrical› Computers, Chips, Modules and Programmers
Holley
Terminator X MPFI GM LS1/LS6
SKU: H00E 550-903T
Moderate — 2–4 hours
Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | Holley |
| Part Number | H00E 550-903T |
| Weight | 9.0 lb |
Videos
Terminator X Full Install and Overview
How To: Install Terminator X EFI on any LS Engine
Holley Terminator X Max install for newbies!
Don't Buy A Holley Terminator X Before Watching This Video
The Best Budget LS Swap ECU 2019 (Holley Terminator X )
Terminator X EFI for LS Engines
Holley Terminator X Just Got a Major Upgrade
Reviewing Holley's Terminator X EFI
BUDGET HOLLEY EFI DIGITAL DASH! CHEAP AND EASY TO INSTALL! E36 Turbo LS Swap Ep: 38
LS 5.3 Swap, Holley Terminator X Max installation on 1981 El-Camino with 4L60E transmission.
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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