FiTech Fuel Injection
Software Download Center

⚠️ Important: New 32-bit LS ECUs began shipping October 2025 and are NOT backwards compatible with older handheld software. If your LS ECU was sold or replaced after August 20, 2025, select "LS System (New 32-bit ECU)" below.  How do I identify my ECU?

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System
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Part #
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Options
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Handheld
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Download

Select Your System Type

Choose the FiTech product family that matches your system.

Select Your Part Number

Find your part number on the product box or unit label.

Additional Options

Please answer the following to get the correct software.

Identify Your Handheld

Select the exact style of your handheld controller.

Your Software Download

Software Ready

Download Software
Installation Instructions
Video Guides
Software Download Agreement
Please read and agree before continuing

By downloading software from this page, you acknowledge and agree to the following:

  • You are downloading software for use with a genuine FiTech EFI product only.
  • It is your responsibility to confirm the software is correct for your specific part number, ECU version, and handheld type before installation.
  • Improper installation or use of incorrect software may result in poor engine performance, damage to your vehicle, or voiding of your warranty.
  • Beta software is provided for advanced users only and has not been fully tested. Use beta files entirely at your own risk.

FiTech EFI is not responsible for any damage, loss, or injury resulting from the download, installation, or use of software obtained from this page.

If you are unsure which software is correct for your system, contact FiTech technical support before proceeding at (951) 340-2624, Mon–Fri 7:00am–4:00pm PST.

This agreement is recorded for your session only. You will not be asked again during this visit.

Need help? Contact FiTech Technical Support: (951) 340-2624  |  techmail@fitechefi.com

Mon–Fri 7:00am–4:00pm PST