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Unleashed Tuning X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (15-17 EcoBoost)

AmericanMuscle no longer carries the Unleashed Tuning X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (15-17 EcoBoost). Please check out 2015-2019 Mustang Custom Tuners for an updated selection.
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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 2 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 Mustang 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 2 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 2.7 inches wide X 5.5 inches 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" 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 2 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: California's Proposition 65

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, 2018 Manual Transmission 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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Questions & Answers (13)

5 Top Rated Questions

will tune remove governor and rev limiter?

  • The Unleashed Tuning X4/SF4 Power Flash Tuner can be used to change or eliminate the rev limiter and speed limiter, however certain modifications may be required to extend either past a certain point. We recommend checking with Unleashed directly to ensure that you meet the requirements for where you want these set.

Helpful (1)

I have a 2017 ecoboost mustang I have a mishimoto air intake and a scavenger y pipe with outlaw axle back will the tune take my mods into consideration when I program it?

  • Upon ordering your Unleashed Tuning X4/SF4 Power Flash Tuner, you will receive an email with a link to a form you will need to fill out. This form will request all of your modifications so that the custom tunes may be made specific for your vehicle and modifications.

Helpful (1)

Does this tuner still come with pre loaded tunes from SCT? That way I can run the pre loaded tunes until I'm ready for the custom tunes from unleashed

could i use the same gas? or do i have to switch I put 87 octane?

  • When using the Unleashed Tuning X4/SF4 Power Flash Tuner, you must use the octane rating your tune is rated for, or higher. So as an example, with a 91 octane tune, you can utilize 91 octane, or 93 octane, but not 89 or 87 octane. You should not use race gas or E85 without a race gas tune or E85, as most race fuels, and all E85 will have a different stoichiometric point than pump gas, and this must be corrected for in a tune.

Helpful (0)

I'm running into nothing but problems, I've called tech support, researched, yet still no solution. I can not figure out how to find the custom tune, something about downloader, let alone transfer it to the tuner. I bought this specifically for "no computer required " which I don't have. Is this possible to do, from start to finish, without a computer?

  • The Unleashed Tuning X4/SF4 Power Flash Tuner w/ 2 Custom Tunes will still require a computer in order for you to get the tunes from Unleashed as the SCT X4 tuner is not able to store tunes and send tunes through the cloud like the new SCT Rev-x tuner can.

Helpful (0)
Post Your Question
8 More Questions
Already running your 93 winter tune. But I wonder. Do you do the following Incase the octane is actually lower than 93 automatically.. "Auto Octane" adjust-ability for all pump gas fuel grades 1 answer
Does the unleashed tunes increase boost if so is it recommended to replace plugs and change the gap? 1 answer
Hello minidave :when you answered the question about the tune effecting the other driving modes in the ecoboost mustang you weren't really clear can you please break it down a bit more (does it mean that you can tune all the driving modes? Thanks 1 answer
Why does it say free tunes for life? 1 answer
Hi I have a brand new 2017 Mustang EcoBoost I'm planning on buying this after I do a couple mods. Will this void my warranty on my car? 1 answer
Does the bama unleashed tuner come with life time tunes? 1 answer
How will installing this tune effect my mustang's drive modes (normal, sport , track and rain)? Will they still be available, will they be modified or will just one change? 1 answer
Whats the difference between this and the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes? Also does the unleashed tuning not come with Free tunes for life? 1 answer

Customer Reviews (43) Write a Review

Overall Rating 4.8

out of 5 stars

  • Performance Gain 4.837209 4.8
  • Seat Of Your Pants Feel 4.767442 4.8
  • Ease Of Use 4.813953 4.8
  • Bang For Your Buck 4.767442 4.8
  • Preferred Tune: Performance



  • 5/5

    July 29, 2018

    Awesome

    This is my 2nd SCT tuner. The Unleashed tune is a must. You wont be disappointed. I smiled for a week after Installing the tune.

    Aaron

    Year: 2015 Submodel: EcoBoost

    Helpful (1)

  • 5/5

    July 22, 2018

    Unleashed Power

    The little 4 banger will sit you back in the seat.. Much better than stock..

    bob3036us

    Year: 2015 Submodel: EcoBoost

    Helpful (1)

  • 4/5

    June 25, 2018

    SCT continues to impress.

    This is my 2nd SCT tuned Mustang and I'm glad I came back to American Muscle. While I haven't yet had a chance to dyno the car to compare numbers, my ecoboost now pulls noticeably harder and for longer through the rev range. The powerband is much improved and my butt dyno says the gains are real and worth the money I spent.

    Ski1605

    Year: 2016 Submodel: EcoBoost

    Helpful (2)

  • 1/5

    May 22, 2018

    revised review

    still did not like this tuner, took away options from my mustang after putting in tune, then had trouble with setup on the computer (desktop) and could only access 1 tune on the device, overall very disappointing, but American Muscle 1st refused return, once I explained exactly why, they accepted the return, with the fact I got a BAMA tuner from their site, hopefully this helps others perhaps I was doing something wrong, didn't find it easy or worth while, thank you to AM for making this right

    rickl

    Year: 2016 Submodel: EcoBoost

    Helpful (3)

  • 1/5

    April 27, 2018

    Does not work on 2018!!

    Purchased custom tunes for my 2018 straight from Unleashed and was told the SCT tuner will not work on the 2018. Only the BDX tuner supports the 2018 at this time.

    MarkM

    Year: 2018 Submodel: EcoBoost

    Helpful (5)

  • 5/5

    March 30, 2018

    Supreme Tune

    I bought this tuner with Unleashed tunes a couple years ago and have kept buying Unleashed tunes as I’ve done more upgrades. The tuner is easy to use whether installing a tune or data logging. And Torrie at Unleashed does an awesome job. Always quick to respond to emails and get you your tune!

    ClintB

    Year: 2015 Submodel: EcoBoost

    Helpful (1)

  • 5/5

    February 01, 2018

    Great Product

    You can definitely feel the difference even with every thing stock.

    ZihanC

    Year: 2016 Submodel: EcoBoost

    Helpful (2)

  • 5/5

    January 24, 2018

    Ecoboosted

    Surprise, it works as advertized. Not a full time racer but do enjoy solo 1and 2 events. To be more competitive I lowered my car 1inch and needed a little more torque to get to speed quicker. Well after installing a CAI, waistgate and cated down pipe, I went with what I felt was the best choice for what I wanted to accomplish and that was the Unleased x4. Bingo!! No more performance mods needed for my class. Not sure of what my total power increase is but from the seat of the pants it quite a bit. No need to go elsewhere, American Muscle has the product and support needed to accomplish your goals.

    stephenw

    Year: 2017 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    December 24, 2017

    Tune

    This tune will blow your socks off. Worth every dime. I was really impressed with the outcome.

    ErnestB

    Year: 2015 Submodel: EcoBoost

    Helpful (2)

  • 5/5

    November 17, 2017

    Woah!

    Day and night difference. I expected a beast due to the reviews on here, but saying I was surprised is an understatement. The torque is just crazy! Still babying the throttle during turns until I get a hang of it. The performance pack Pirelli P Zero summer tires are no match. Install was quick and easy and drivability is still there. I hope you like driving fast because you'll have to baby the throttle otherwise!

    Thomas

    Year: 2015 Submodel: EcoBoost

    Helpful (2)

  • 5/5

    October 14, 2017

    Be prepared to unleash the Beast

    Unleash Tuning has been outstanding thus far. My ecobeast performs almost like his bigger more powerful brother (GT) It was definitely worth it. Thanks guys

    Beastmode1

    Year: 2017 Submodel: EcoBoost

    Helpful (2)

  • 5/5

    October 03, 2017

    Good

    Good product you can feel power gains right away easy to use takes 15 minutes

    RaymondS

    Year: 2016 Submodel: EcoBoost

    Helpful (2)

  • 5/5

    September 14, 2017

    91 Octane

    This was my first Mod so I was nervous about being disappointed but it's far from disappointing. Extremely obvious increse of power and it changed how the car operated as far as shift points and I'm very satisfied with the mod and will be doing many more.

    AlexM

    Year: 2015 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    September 06, 2017

    Outstanding

    This is my first experience with this type of tuning, and it was a fantastic one! When this arrived, I reached out for the tune, within minutes had a response, and just about a half hour for the request to be fulfilled. I updated the car's tune, and took it out for a spin... and when you see the "totally different car" reviews... they're not kidding! Throttle response was much better, and overall power is incredible! I still manage over 30mpg... This is what the eco should have been from the factory. Very happy customer.

    Kris

    Year: 2017 Submodel: EcoBoost

    Helpful (5)

  • 5/5

    August 22, 2017

    Should be this way from factory

    This is so easy to install or roll back to stock.. fifteen minutes either way. Not sure it completely clears all of the codes. I will test that later. But it really wakes up this little four cylinder..

    LawrenceD

    Year: 2016 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    August 10, 2017

    Tuner

    Great handheld, even better with the unleashed tune from torrie. Highly recommended

    MalachiP

    Year: 2017 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    July 13, 2017

    Whole new machine

    Spins through 3rd great solid torque and with mods combined defiently gives you a greater pull through the whole rpm range

    CodyR

    Year: 2017 Submodel: EcoBoost

    Helpful (4)

  • 5/5

    July 06, 2017

    Unleashed Tune

    Great tune can tell the performance right away ! Easy to install and lots of power gain.

    LuisR

    Year: 2017 Submodel: EcoBoost

    Helpful (3)

  • 5/5

    July 04, 2017

    big difference

    having had this product for a awhile now I am very happy with it after installing I seen huge difference in power out put and over acceleration. my friends that rive 13 and 14 gts are very impressed with the way the car performs.

    skispony

    Year: 2016 Submodel: EcoBoost

    Helpful (4)

  • 5/5

    June 04, 2017

    Go SCT or go home

    and the horsepower curve goes to 6 67 horsepower with all and special tune this is one ba and special tune this is one bad EcoBoost

    BruvK

    Year: 2015 Submodel: EcoBoost

    Helpful (3)

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