Help is just a click away!
Click here to chat with a Speedway Team Member
Online - Chat with us!
Products to Compare (max of 3)
Compare These Parts
Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Customer Service
Since 1952
Talk to the Experts. Call 800.979.0122
Shop By
Street Race Truck More... The Toolbox
Add to Cart
FiTech 70051 Ultimate LS Standalone EFI ECU w/ Trans Control
FiTech 70051 Ultimate LS Standalone EFI ECU w/ Trans Control

FiTech 70051 Ultimate LS Standalone EFI ECU w/ Trans Control

Chevy LS V8, 4L60E, 4L65E, 4L70E, 4L80E, Transmission Control

0 Reviews | 0 Answered Questions
In Stock
Ships FREE
Select your vehicle to verify fitment.
Select Vehicle
FiTech 70051 Ultimate LS Standalone EFI ECU w/ Trans Control
FiTech 70051 Ultimate LS Standalone EFI ECU w/ Trans Control
Zoomed In Image
Part # 52170051
Add to Cart
Call to Order
Add to Buildlist
Videos & Articles

Important Messages:

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.


Sold in Quantity:
GTIN Code:
MFG. Part #:
Transmission Control:


No dyno, no tuner, no factory re-flashed ECU! The FiTech 70051 Ultimate LS Standalone EFI ECU kit is the ultimate LS swap computer for DIY enthusiasts who want full control over their engine and transmission. Avoid having to buy additional software programs, learning how to think in computer code, or relying on a questionable 3rd party tuner. The included color touch screen interface allows for custom tuning adjustments to your LS engine as well as a self-learning program to get you on the road. FiTech Ultimate LS EFI is the perfect product for using the factory GM intake, throttle body, and injectors, while leaving the factory GM computer and harness in the junkyard where they belong. It is suitable for use with most 4.8 LS, 5.3 LS, LS1/LS6, 6.0 LS, 6.2 LS, and LS7 GM engines. 

Kit includes LS engine wiring harness, standalone LS ECU, wideband O2 sensors and a handheld tuner. FiTech 70051 also includes a feature to control GM electronically controlled automatic transmissions. This allows you to configure shift points, shift firmness, when to downshift, among other features. Compatible GM transmissions include the 4L60E, 4L65E, 4L80E, and 4L85E. Other LS engine-only ECUs are avaialble in the FiTech Ultimate LS Series if you're using a different transmission.

Installation Instructions (PDF)


  • LS or similar engines with crank and cam sensors.  Transmission control feature is suitable for 4L60, 4L65, 4L80 or 4L85GM transmissions.
  • Small Block V8 Gen III/IV LS-based Chevrolet street and performance engines.  Contains a 3 BAR MAP sensor for power ader applications that suppors up to 30 PSI of boost.


  • Kit comes with one 02 sensor.  If you'd like to run a second, you may want to source a Bosch 17014 from your local auto parts store.
  • This kit does not work with drive by wire throttle bodies and variable valve timing.  These engines can be modified to remove these components.





Self-learning ECU with touch screen controller for easy setup and configuration.
Sequential fuel and spark control with individual cylinder trim.
Dual Bosch wide band with dual trim control (Self-learning).
3 BAR MAP sensor automatically detects up to 30 psi boost.
Stainless O2 Sensor bung (clamp or weld on).
24X and 58X crank and cam compatible.
Two programmable fan control outputs.
Tach output driver for most tachometers (5V).
Output driver for most speedometers.
Compatible with car and truck coils.
On the fly programmable target AFR and timing (if desired).
Fuel pump relay output.
Custom wire harness (uses factory coil pack sub harness).
Knock sensor control.
Transmission control feature is suitable for 4L60, 4L65, 4L80 or 4L85 GM transmissions.
Some parts are not legal for use in California or other states with similar laws/regulations

Related Products

More Like This


Q & A

Videos & Articles
  • After installing the intake manifold and carbs on his 8BA, Heath P. continues on to the fuel and throttle setup. See how he mounts each part while making modifications to complete the install.
  • Do you have carbs sitting on the shelf waiting to be put on? Heath talks about the preparation and parts needed to install a set of Super 9-7 Carbs on his 1949 Flathead 8BA V8 Model A.
  • One of the most important parts of your racing operation is the engine. This article gives a detailed overview on how to maintain your engine to get the most out of it for as long as possible. Also learn some tips to prolong the life of your engine.

You May Also Like