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Link G4X Atom EMS ECU Stand Alone Engine Management

Link G4X Atom EMS ECU Stand Alone Engine Management

WE HAVE PLUG AND PLAY APPLICATIONS AVAILABLE, SUCH AS 1UZ! Please contact us with your build and we can offer adapter harnesses

Please note free shipping is in the USA lower 48 states only. Please contact us with a shipping quote to your location if you are outside the USA or are in Hawaii/Alaska.

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  • $850
Free shipping

The Link G4X AtomX ECU is the latest version of Link's entry-level ECU. Don't let its size fool you however, the AtomX has expanded data logging and uses the same microcontroller as the entire G4X range! It is more responsive and has higher bandwidth than its G4+ Atom II predecessor. 

G4X features 512 megabytes of logging at 32bit using up to 250 channels, each limited to up to 1kHz per channel (by the Operating System), with a maximum of 100k Samples/sec.

G4X features 8 x faster communications speed, allowing you to download logs 8 x faster and pushes all the logging quickly up to a new and improved PCLink – available for download below in the features tab. 

The AtomX can control up to 2 rotors or 4 cylinders with sequential injection and direct spark. Or, it can be used for up to eight cylinders using batch fire. Now featuring Knock Control.

This makes it ideal for naturally aspirated engines that just need a re-tune and don't need all the extra sensors and features that come with our higher level ECUs. 

The AtomX is ideal for: 

1-12 Cylinder Distributed

2-8 Cylinder Wasted Spark

1-4 Cylinder Direct Spark

Odd Fire Engines

2-Stroke Engines

Configurable Firing Order

Configurable TDC Points (for odd fire)



2 x Digital inputs

2 x Temperature inputs

3 x Analog inputs

2 x Trigger inputs

1 x Knock Input


4 x Injector drives

4 x Ignition drivers

4 x Auxiliary outputs*

+5V Sensor power supply

*unused ignition drives can be used as additional Aux


1x CAN bus

1x USB tuning connection

1 x thirty four pin, waterproof connector

Upgraded Communications Chip


Comes loaded with all of Link ECU's standard features.

512MB of logging memory

20 general purpose tables

Runs on PC Link software for G4X


Dimensions: 90mmL x 130mmW x 45mmH (without loom)

Weight: 180 grams

What's in the box:

The AtomX ECU is supplied with a USB tuning cable, mounting bracket and four Link ECU stickers. 

    • SKU
  • Link External MAP Sensor
    No thanks, Yes, 5 bar 1/8 NPT, 101-0071, Yes, 4 bar, 101-0165, Yes, 2.5 bar, 101-0163, Yes, 3 bar, 101-0164
  • Link IAT Sensor
    No, Yes + steel weld boss 101-0045 + 47, Yes + aluminum weld boss 101-0045 + 46, Yes, 101-0045
  • Link Ethanol Sensor
    Yes, with -6 AN fitting 101-0034, No
  • Link Oil/Fuel 10 bar Pressure Sensor
    Add both!!, Add one please! 101-0080, No
  • Link Coolant Temp Sensor
    Yes, 101-0076, No
  • Link Boost Control Solenoid
    Yes, 4 port 4BCS, Yes, 3 port 3BCS, No

Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.

IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.

We accept the following payment methods:

Also Venmo and unmarked nonsequential dollar bills

  • Fitment Type
    Vehicle Specific
Toyota/LexusLexus LS/Celsior1995-1997 UCF20/21 LS400/Celsior1UZ-FE 4.0 V8 non-VVTi
Toyota/LexusCrown Majesta1995-1999 S1501UZ-FE 4.0 V8 (UZS151, UZS155, UZS157)
Toyota/LexusLexus SC/Soarer1992-2000 Z301UZ-FE non-VVTi 4.0 V8 UZZ30 (92-97)/31/32

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