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Unleashed Tuning X4/SF4 Power Flash Tuner w/ 3 Custom Tunes (15-17 EcoBoost)

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Features, Video & Details

  • SF4/X4 is the Newest Replacement for the Popular SF3/X3
  • Improves Power and Overall Performance
  • Peak Gains: 38 RWHP / 119 RWTQ
  • Curve Gains: 67 RWHP / 119 RWTQ
  • On Screen Data Logging and Monitoring
  • Reads/clears DTC Trouble Codes
  • Full Color LCD Display with Auto Dim Feature
  • Built-in WiFi for Easy Updates
  • PC/Windows Compatible Only
  • Includes 3 Custom Files from Unleashed Tuning
  • Includes Post Sale Calibration Support from Unleashed Tuning
  • Fits 2015-2017 EcoBoost Mustangs

Review & Installation Video

Review & Install Video

  • Buy this Tuner &

    Submit your Mustang's Info Here
  • A Unleashed Tuning Calibrator will write custom tune files specifically for your Mustang & Mods
  • Load 'em on your Mustang and GO!

Increases Horse Power and Torque. By optimizing the air/fuel ratio, adjusting ignition timing and tweaking variable cam timing, an Unleashed Tuning Custom Tune will squeeze out the extra power Ford left on the table. From the factory, the manufacturer programs their vehicles to cater to the needs of the daily driver, not the performance enthusiast, but after loading a Unleashed custom tune file on your EcoBoost, even a bone stock, unmodified Pony will see Peak Gains of 38 RWHP / 119 RWTQ and Curve Gains of 67 RWHP / 119 RWTQ.

Unleashed Custom Tunes. When you order a SCT SF4/X4 tuner, you aren't just getting a tuner - you are getting the tuner and 3 custom tunes that are written specifically for your Mustang and your particular modifications by Unleashed Tuning. Unleashed Tuning even provides post sale calibration support to assure your Pony is running healthy and strong.

Compact Design. The SF4/X4 Power Flash Tuner measures in at 2.70 inch wide X 5.50 inch tall making it much smaller than the original SF3/X3 for easy storage in your center console or glove box. The cord is detachable and there is no battery or power supply needed. It uses the power from your vehicle's diagnostic port or computers USB connection.

Full Color Display. The SF4/X4 Power Flash Tuner features a full color 2-3/4-inch diagonal LCD screen with user adjustable portrait or landscape modes. The SF4/X4 also has a convenient power saving auto dim feature.

Built-in WiFi. The SF4/X4 Power Flash Tuner is now WiFi-capable meaning you will no longer have to plug it into your PC/Windows computer to receive the latest SCT firmware updates.

Diagnostics. The SF4/X4 Power Flash Tuner can also be used as a diagnostic code reader. Save yourself hundreds of dollars each year by reading and clearing your own trouble codes rather than paying a dealer to do the same. Its as easy as a few simple steps.

On Screen Data Logging and Monitoring. With a full color LCD display, the SCT SF4/X4 Power Flash Tuner makes it EASY to read the Built-In Data Logging or Real Time Monitored Vehicle Data, view popular sensor data such as EGT, Air/Fuel Ratio or any other 0-5 Volt source.

Easy to load; easy to restore. When you load your custom tune on the vehicle, the tuner automatically stores your vehicle's factory settings. To return the vehicle to its factory settings, just plug the tuner back in, select the option to restore the factory settings, and you're done.

Application. This SCT X4/SF4 Power Flash Tuner with 3 custom tune files by Unleashed Tuning is specially designed to fit the 2015-2017 EcoBoost Mustangs equipped with the turbocharged 2.3L Inline 4-cylinder engine.

**Please Note: The SCT SF4/X4 Tuner ships blank from AmericanMuscle, the custom tune files will be emailed directly to the end user within 3-4 business days from Unleashed Tuning.

Fitment: 2015 2016 2017 Details

CA Residents: WARNING: Cancer and Reproductive Harm -

What's in the Box
  • (1) SF4/X4 Power Flash Tuner
  • (1) USB PC Interface Cable
  • (1) OBDII Interface Cable
  • (2) Unleashed Tuning Custom Tune Files
Installation Info
Tech Specs

SCT SF4/X4 Power Flash Tuner Features:

Chip/Handheld: Handheld Custom/Strategy: Custom tunes by Unleashed Tuning
Memory Size: 4 GB Custom Tunes Held: 10
Year: 2015-2017 EcoBoost Model: SF4/X4 Power Flash Mustang Custom Tuner
Manufacturer: SCT Special Features: Includes post sale calibration support from Unleashed Tuning
Will it fit my Mustang?

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Customer Reviews (6) Write a Review

Overall Rating 5

out of 5 stars

  • Performance Gain 5 5
  • Seat Of Your Pants Feel 4.833333 4.8
  • Ease Of Use 4.5 4.5
  • Bang For Your Buck 5 5
  • Preferred Tune: Performance

  • 5/5

    July 08, 2018

    My Mustang has come alive thanks to Unleashed!

    An amazing tune! The car is so much better with the new tunes. Excellent job Unleashed!!!


    Year: 2017 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    September 12, 2017

    Great tuner and Wow what a different in power.

    I installed a Mishimoto downpipe, intercooler with full charge pipe setup and MSRP 3 inch catback w/ a TurboSmart BOV and Roush intake. Then I put on the tune from Unleashed, dang did my EcoBoost come to life. I was amazed on how much torque I was making when I took it to the Dyno, over 90lbs difference (it was over 100 degrees in Phoenix when this was done). Anyway the device was very easy to update and getting the tune file from the vendor was easy as well. The has come in handy for additional data logging. I recommend this to anyone.


    Year: 2015 Submodel: GT

    Helpful (5)

  • 5/5

    July 21, 2017

    Awesome Product

    I gotta say. If you want to feel the power of the ECOBOOST Mustang. This is a must need product with 3 tunes . But of course you definitely need the 93 Octane. The difference between stock and the 93 is just absolutely bizarre and wonderful ! Recommend for all ecoboost mustang owners


    Year: 2017 Submodel: EcoBoost

    Helpful (8)

  • 5/5

    June 15, 2017

    They named it properly

    Excellent product! Highly recommend this to anyone looking to "unleash" their ecoboost into an ECOBEAST! I've had people say, "sounds like a 4 cylinder still"......well, no s#!t. It's still a 4 cylinder I tell them, and then I take them for a ride.....they're either left shaking from excitement or scared (not sure which) but EVERYONE has been absolutely amazed by it. Enjoy, fellow "tuners"!


    Year: 2017 Submodel: EcoBoost

    Helpful (5)

  • 5/5

    March 27, 2016

    SCT x4/sf4 Unleashed tuning

    Great product!! You really feel the difference after tuned. I personally felt like someone put v8 engine in my car. I would highly recommend this tune for all my ecoboost fellows out there.


    Year: 2015 Submodel: Ecoboost

    Helpful (6)

  • 5/5

    January 21, 2016

    SCT Unleashed Tune, Ecoboost Automatic

    When I recieved my tuner, I emailed Torrie and within a few hours I recieved my three tunes. I got a 89 winter tune, 91 summer tune and a 93 summer tune. I had a an issue connecting my tuner to my laptop but I looked over a few forums and fixed it. Once I installed the 89 octane tune since I dont have my summer tires on yet, the car acted like a completely different car. I was first skeptical on if I would really feel a difference but the car now throws you back and in sport mode it will throw you side ways in third if you hit the throttle to hard and my mustang is completely stock! It also doesnt fall on its face anymore, it pulls all the way to redline. I am completely satisfied with the tuner and my results. I was debating between the SCT unleashed tunes or going with a cobb tuner and I am extremely happy with my choice!


    Year: 2015 Submodel: Ecoboost Chicago

    Helpful (6)

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