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Vehicle Info NeededHOLLEYPART NUMBER: 510-550-903T
Terminator X EFI ECU Kit for GM LS1 and LS6 with EV1 Injectors No Handheld
$1,23195$1449.95You Save$218.00
1 left in stock
Ships on Sep 08, 2026
Lowest Price GuaranteeGM LS
LS1/LS6 24x Tooth Reluctor
LS1/LS6 24x Tooth Reluctor
Terminator X EFI ECU KitGM LS1 and LS6 Engines 24x Crank, 1x Cam, EV1 Injectors Self-Learning Fuel with 1-Bar MAP Sensor Four 12-Volt and 5-Volt Programmable Inputs USB/CAN Cable and RPM-Based Boost Control
Terminator X is a self-tuning EFI ECU kit for GM LS1 and LS6 engines, tuned over a USB/CAN cable with the free Terminator X software instead of a handheld display.
Holley 550-903T Highlights:
- Fits GM LS1 and LS6 engines.
- 24x crank, 1x cam, EV1 injector harness.
- Real-time self-learning fuel with 1-bar MAP sensor.
- Four 12-volt and 5-volt programmable inputs and outputs.
- USB/CAN tuning cable in place of a handheld.
- Bosch LSU 4.9 wideband oxygen sensor included.
Part TypeEngine Control Module
BrandHOLLEY
Package Height7.9
Package Width11.5
Package Length12.5
Weight8.75 PG
Part CategoryPerformance Parts
Part FitmentUniversal
Package Qty1
Package TypeEA
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