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Ignitions and Electrical› Computers, Chips, Modules and Programmers

Holley

Term X Max MPFI Kit LS Early Truck w/Trans Cont

$2,137.95 $1,916.85 Save $221.10

SKU: H00E 550-917

In Stock
In Stock
Ships by Jun 10
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Take control of your LS engine with Terminator X Max! This kit provides complete engine control, self-learning fuel strategies, and race-winning Holley EFI technology. It features real-time fuel learn, high impedance injector drivers, an integrated 1bar MAP sensor, and 4 programmable inputs and outputs. The 550-917 also includes 4L60 or 4L80 Transmission control. It comes pre-loaded with base maps for common LS engine combinations for quick setup. The kit includes a 3.5" touchscreen LCD handheld for calibration and tuning, and offers full laptop access for advanced users with Holley EFI's software suite.

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

BrandHolley
Part NumberH00E 550-917
Weight8.9 lb

Videos

How To: Install Terminator X EFI on any LS Engine

How To: Install Terminator X EFI on any LS Engine
Ditch the Carb and Go EFI with Holley Terminator X Stealth 4500 and 4150

Ditch the Carb and Go EFI with Holley Terminator X Stealth 4500 and 4150
Terminator X Full Install and Overview

Terminator X Full Install and Overview
Holley Terminator X Max install for newbies! Easier than you think!

Holley Terminator X Max install for newbies! Easier than you think!
Silverado Holley Terminator X Integration (Part 1)

Silverado Holley Terminator X Integration (Part 1)
Holley Terminator XMAX on a Ford F-150!! First Crank!! KSR How To and Tech Tips!!

Holley Terminator XMAX on a Ford F-150!! First Crank!! KSR How To and Tech Tips!!
LS 5.3 Swap, Holley Terminator X Max installation on 1981 El-Camino with 4L60E transmission.

LS 5.3 Swap, Holley Terminator X Max installation on 1981 El-Camino with 4L60E transmission.
HOLLEY Terminator X Max Install and setup LS

HOLLEY Terminator X Max Install and setup LS

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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