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Holley

Terminator X MPFI Kit GM LS2/LS3 Late Truck

$1,574.95 $1,399.95 Save $175.00

SKU: H00E 550-905T

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

Terminator X ECUs are designed for GM LS-Series engines with a 58x Reluctor Wheel. Key features include real-time fuel map learning, high impedance injector drivers, and a Bosch LSU 4.9 wideband sensor for accurate AFR. It offers 4 inputs (12v, Ground, 5v, Frequency) and 4 outputs (Ground, PWM) for accessories like fans, boost control, and nitrous control. Boost control features include Boost vs Time, Gear, RPM, and Speed, along with boost safeties. Nitrous control offers single channel wet or dry, progressive/non-progressive, rich/lean safeties, and closed-loop AFR. On-board diagnostic LEDs provide quick identification of critical engine issues. Advanced tables (4x 1D, 1x 1D per Gear, 4x 2D, 1x 2D per Gear) allow for custom tuning, such as Flex Fuel sensor offsets or pressure safeties. The compact ECU comes with a CAN/USB tuning cable for real-time configuration. It's plug-and-play compatible with Holley EFI accessories like analog gauges, shift lights, and future 12.3\" digital dash support. Free EFI Tuning Software is included. The kit comprises: 58x/4x LS Engine Main Harness, EV6 Injector Harness, Terminator X ECU, ECU Main Power Harness, Bosch LSU 4.9 Wideband Oxygen Sensor, Input/Output Harness, and various vacuum adapters.

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Specifications

BrandHolley
Part NumberH00E 550-905T
Weight7.6 lb

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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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