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VMP X4/SF4 Power Flash Tuner w/ 3 Custom Tunes (11-14 GT, 12-13 BOSS Stock or w/ Bolt-On Mods)

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Features, Videos & Details

  • SF4/X4 is the Newest Replacement for the Popular SF3/X3
  • Improves Horsepower, Torque and Overall Performance
  • Peak Gains of 7 RWHP / 5 RWTQ - 93 Octane
  • Curve Gains of 24 RWHP / 39 RWTQ - 93 Octane
  • 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 VMP Tuning
  • Includes One Datalog Review (If Necessary)
  • Fits 2011-2014 Stock GT Mustangs with or without Basic Bolt-On Modifications

Review & Installation Video

Hey everybody, I'm Justin with, and this is my detailed review and dyno test of the VMP X4/SF4 Power Flash Tuner, loaded with 3 custom VMP tunes, available for your 2011 through 2014 Mustang GT. So the VMP tunes are definitely going to be more of a premium tuning option available here at AM, with a focus on refined drivability. That's going to be the big separating factor here, guys. Now, VMP tunes are really going to shine with the more heavily modded setups, so your full bolt-on cars, nitrous applications, forced induction, things like that, where VMP has really earned their reputation in the Mustang community. That being said, this is still going to be an awesome option for stock to lightly modded setups, for guys at home who might be more familiar with the VMP name, and doesn't mind spending a few bucks more compared to some other tuning options here on the site. Now before I start breaking down what separates the VMP tunes from some of your other options here on the site, along with breaking down some of the features with the X4 device, let's get to the thing you guys all want to see, and that is the dyno numbers. Now we already grabbed our baseline run using our 2011 automatic GT behind me earlier today, so we reran the car with the 93 Octane VMP tune uploaded, and here are the results. Baseline run using our 2011 automatic GT gave us 342 horsepower and 323 pound feet of torque at the rear wheels. With the 93 Octane VMP tune uploaded, the car is now making 354 horsepower and 350 pound feet of torque. That's good for a peak gain of 12 horsepower over those baseline numbers, and gains of as much as 24 horsepower and 39 pound feet of torque under the curve. Breaking down these VMP numbers a little further here guys, here's what you need to keep in mind. Yes, this is an automatic car, so these numbers might seem a little lower than usual, stick cars will definitely see higher numbers, but overall the car picked up a ton of horsepower and a ton of torque down low, basically between 2,000 and 5,000 rpm, you're seeing huge gains underneath the curve, and that's going to be your main operating range when it comes to driving the car everyday, red light to red light, that's the power increase you're really going to feel. Now of course you did pick up a little bit up top as well, but again, those big gains are down low, and that's pretty solid overall. So now that you know a little bit more about the numbers, let's talk about the VMP tune in depth. So let's quickly address why you might want to upgrade your tune in the first place. Now the factory calibration in the '11 to '14 cars are definitely geared toward the masses, with comfort and fuel economy often times taking precedent over power. So when owners start looking for a little bit more power, an aftermarket or custom tune is definitely a great place to start. As we saw in our dyno jet, the car, no other mods changed, picked up a ton of power and torque, with the tune by itself, in addition to totally transforming how the car behaved. You're going to see improved throttle response, increased low-end torque, snappier shifts with our automatic, and improved drivability. And as the modding bug really starts to set in, as it often times does with a lot of us, that aftermarket or custom tune becomes essential, especially as those more involved modifications start finding their way onto your car. This includes those long-tube headers, larger cold-air intakes, aftermarket intake manifolds, nitrous applications again, or forced induction, any of these things, an aftermarket tune is a must. So why is the VMP tune going to be a more premium option here on the site? Well they have been around in the tuning industry for quite some time, and over that time they've of course really developed their power, as we witnessed with our dyno results, but they've also spent a really good amount of time nailing their drivability, and that's going to be the big separating factor when choosing a VMP tune over maybe some of the other options here on the site. Now very smooth throttle response, no surging, no idling issues, no stalling, things like that. Basically driving around town, the car's going to offer a great driving experience, no matter what your modifications. Now with our automatic equipped car, the shifts again were firm, they were sporty, without any drama whatsoever. You are going to be receiving three custom tunes written directly by VMP, ordered through us here at, a low, medium, and high octane tune, depending on what kind of fuel you guys have available in your area. Now that low octane tune's going to deliver some additional benefits over your factory calibration, namely a little bit more power, some improved drivability, but it's not going to be as aggressive as the 93 octane or high octane tune, because that will typically utilize a little bit more ignition timing and some other things to deliver those bigger gains. And if you should need it, VMP will offer one data log revision if necessary. Since the VMP tunes are a slightly more high-end option, expect to spend a little bit more than some of your other options here on the site, for your GT. Again, they do offer the E85, nitrous, and forced induction tuning, and that's going to add a little bit more to the final price tag. Now those tunes do come emailed to you for easy upload onto your X4 Power Flash Tuner, which does have some nice features on its own. Some of the biggies with the X4 Tuner include a nice bright, full-color LCD screen, which is going to be very easy to see, it can data log with a simple touch of a button, it's going to be able to read and display up to eight different values from your car's ECU at any time. This includes intake air temperature, air/fuel ratio, RPM, cooling temperature, things like that. It can store up to 10 tunes at one time, and it can read and clear those diagnostic trouble codes. And if for whatever reason, you ever wanted to return your car back to stock, the X4 can easily handle that for you with a simple touch of a button. Installing or uploading your custom VMP tune will definitely be one of the easier mods you'll ever tackle with your S197, so for that I'll call it an easy one out of three wrenches on my difficulty meter, and that's being a little generous. Now you're first going to want to locate your car's OBD II port, which on the S197 is located on the lower left-hand portion of the dash. Plug the X4 tuner in, and wait for it to power on. At that point, simply navigate the menu to the program vehicle tab, select a tune you wish to upload, and then follow the directions from there, and you should be good to go in roughly 20 to 30 minutes, from start to finish. Having a chance to drive the VMP tuned 2011 GT, I can safely say they've done their homework in regards to drivability, and the power gains are certainly there, like I've already shown you with the dyno results. So even though you are spending a little bit more for the VMP option right up front, you're getting a proven product with an established name that can handle

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

Increases Horse Power and Torque. From the factory, Ford programs their vehicles to cater to the needs of the daily driver, not the performance enthusiast who adds aftermarket bolt-on modifications in search of more power. That is why a custom tune file is so important, by optimizing the air/fuel ratio, adjusting ignition timing and tweaking variable cam timing, a VMP Tuning Custom Tune will squeeze out the extra power your aftermarket performance mods have to offer. Peak Gains of 7 HP @ 5300 and 5 ft-lb @ 2600, with Curve Gains of 24 HP @ 5200 and 39 ft-lbs @ 2950 have been seen on a bone stock 5.0L Mustang with a VMP 93 octane tune installed.

VMP 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 VMP Tuning. VMP Tuning even provides one post sale datalog review (if necessary) to assure your Pony is running healthy and strong.

Compact Design. The SF4/X4 Power Flash Tuner measures in at 2.7” wide X 5.5” 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 3 custom tune files by VMP Tuning is specially designed to fit the 2011-2014 GT and 2012-2013 BOSS Mustang's equipped with the coyote 5.0L 4 valve V8 engine with or without basic bolt-on upgrade modifications such as a Cold Air Intake, Throttle Body and/or Full Exhaust System.

Application Notes. For Mustangs with basic bolt-on modifications see part# 390483, for fuel or nitrous upgrades see part# 390485, for aftermarket superchargers or cam swaps see part# 390487.

**Please Note: The SCT SF4/X4 Tuner ships blank from AmericanMuscle, the custom tune files will be emailed directly to the end user within 5-7 business days from VMP Tuning.

This product will not ship to addresses in California due to state regulations. Additionally, support will not be provided for tuning for California residents.

Fitment: 2011 2012 2013 2014 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
  • (3) VMP Tuning Custom Tune Files
Installation Info
Tech Specs

SCT SF4/X4 Power Flash Tuner Features:

Chip/Handheld: Handheld Custom/Strategy: Custom tunes by VMP Tuning
Memory Size: 4 GB Custom Tunes Held: 10
Year: 2011-2014 GT, BOSS Model: SF4/X4 Power Flash Mustang Custom Tuner
Manufacturer: SCT Special Features: Includes one datalog review from VMP Tuning
Will it fit my Mustang?
  • Boss 302 - 12, 13
  • GT - 11, 12, 13, 14

Intended for stock GT or BOSS models with or without Bolt-On Modifications such as a Cold Air Intake, Throttle Body and/or Full Exhaust System.

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Questions & Answers (5)

5 Top Rated Questions

I have a 2014 GT, with no engine mods as of yet. I have a couple of questions. By using this tuner, will I have to run 93 octane all the time? By loading the tunes made for my car, will this eliminate the throttle lag?

  • Hello! With this VMP X4/SF4 Power Flash Tuner w/ 3 Custom Tunes you don't have to necessarily run the 93 Octane tune. They are custom tunes so you can have them custom made for your intended use and they should be able to reduce throttle lag. However I do recommend the BAMA X4 tuner over this one, as BAMA is our in house tuning department. Also with the BAMA X4 you receive Free Tunes for Life!

Helpful (1)

Does vmp make a ghost cam tune for 2014 5.0's?

  • VMP does not currently offer a ghost cam tune no.

Helpful (0)

Can the X4/SF4 read and clear codes from any make/model vehicle or just the Mustang?

  • It can only read and clear codes for the mustangs and F150s, not other models.

Helpful (0)

I have a set of tunes already for the mods i have, but i would like to add a boss 302 intake manifold and 90mm throttle body, which is going to require a new set of tunes. Do you how much a new set of tunes from VMP will cost by any chance?

  • We do offer VMP tunes by themselves I have provided a link below.

Helpful (0)

With the 3 custom tunes included with this, is it 3 separate tunes your getting included from VMP? Also, how are revisions handled if I decide to add more mods down the road and need a revision to a tune?

  • Once a purchase is made for this item you will be required to fill out a quick survey about all that was modified on your vehicle. With that information VMP will be able to calibrate 3 tunes to your liking, e.g- Race tune, Performance tune and a conservative tune. As far as making a change in your tune, you will have to purchase a new set of tunes. The prices depends on what all is done to your car: Basic bolt on mods (11-14 GT; 12-13 BOSS): Item# 390484 ( Nitrous, E85 or Mild Performance mods (11-14 GT; 12-13 BOSS): Item# 390486 ( Aftermarket cams, Heavily modded N/A vehicles and Supercharged vehicles (11-14 GT; 12-13 BOSS): Item# 390488 (

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Customer Reviews (10) Write a Review

Overall Rating 4.2

out of 5 stars

  • Performance Gain 4 4
  • Seat Of Your Pants Feel 4.1 4.1
  • Ease Of Use 4.4 4.4
  • Bang For Your Buck 4.2 4.2
  • Preferred Tune: Race

  • 5/5

    August 16, 2017

    Vmp x4 tuner

    Just ordered a boss 302r intake and airaid race cold air along with the vmp x4 tuner got it all installed sent out for the tune next day had a tune back in few days. Installed tune Car runs great idles perfect no lights and flat out screams now. Would definitely recommend vmp for all your tuning needs. Very knowledgeable staff.


    Year: 2012 Submodel: GT

    Helpful (4)

  • 5/5

    June 12, 2017


    Great tuner easy to use vmp was very helpful with the whole process and data logging


    Year: 2014 Submodel: GT

    Helpful (4)

  • 5/5

    May 31, 2017

    Solid tune

    Can't complain at all about the tune. The time frame was a little longer than expected. However end result was great. Will use this process again if I decide to go forced induction.


    Year: 2011 Submodel: GT

    Helpful (4)

  • 5/5

    May 27, 2017

    VMP X4

    Completely satisfied with this tuner I bought one for both of my mustangs and they are well worth the money


    Year: 2011 Submodel: GT

    Helpful (4)

  • 5/5

    March 03, 2017

    Great easy to use

    So easy to use, great feachers able to turn off rear o2 seniors change gear ratios and rev limiter just with the hand held tuner even if you have no experience with devices such as this your be able to easily stumble your way threw it took about 15 mins to save my factory tune and to upload the 93 tune I couldn't be happier my gas mileage increased on my last road trip and the power band feels much smoother than before


    Year: 2011 Submodel: GT

    Helpful (4)

  • 3/5

    February 21, 2017

    Tuner is great, tune is average

    The x4 is a great tuner no doubt. Data logging is much more difficult than the ngauge though. As far as the tune? I'll say it's about average. I've had Lund, MPT, Bama and now VMP. You only get one datalog revised tune where as Lund will work with you till it's perfect regardless of how many datalogs you do. I'd put VMP one above bama as far as quality.


    Year: 2012 Submodel: GT

    Helpful (7)

  • 1/5

    December 21, 2016

    tune i cant run because of CEL

    vmp tune is nice but basically its useless because i cant run it, the CEL is lit up due to offroad h pipe. they could have at least change the values of the o2 sensors very disappointed! waste of money and ended up just running the sct pre-loaded tune


    Year: 2014 Submodel: GT

    Helpful (8)

  • 4/5

    September 03, 2016

    Very happy

    I'm happy with this tuner it did what it said it would do. I noticed the hp and torque gains. I even get better gas mileage on the highway. I can't wait till I get some coustom tunes add to it though.


    Year: 2012 Submodel: GT

    Helpful (6)

  • 4/5

    April 04, 2016

    Great tune

    This tune was great felt a bit more power than Bama. No problems whatsoever


    Year: 2013 Submodel: GT

    Helpful (6)

  • 5/5

    April 03, 2016


    Tune does major work helps the car alot especially paied with an intake.


    Year: 2012 Submodel: GT

    Helpful (5)

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