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Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

100+ Reviews
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  • Item #101200G99
  • MPN#101200G99

  • Market Price $429.99
  • You Save 7% ($30.00)
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  • SF4/X4 is the Newest Replacement for the Popular SF3/X3
  • Improves Horsepower, Torque, Overall Performance, and More
  • Comes With Two Bama V2 Custom Bama Tunes - a $150 Value
  • Includes Datalogging w/ Unlimited Revisions to Guarantee Maximum Safe, Reliable Power
  • Free Tunes for Life!
  • 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
  • Free Personalized ID Plaque (Pictured)
  • PC/Windows Compatible Only
  • Fits 1999-2004 GT and Bullitt Mustangs
Bama Custom Tuning at AmericanMuscle. Power. Performance. Personalized. Proven
  • Power

    1999-2004 GT and Bullitt Mustangs have dyno proven gains of 21 RWHP and 34 ft-lb's of Torque or more on Bama Custom V2 Tunes. By optimizing the air/fuel ratio and tweaking spark timing, a Bama Custom Tune is proven to squeeze out the extra horsepower Ford left on the table.

  • Performance

    Drastically enhanced throttle response and a much more aggressive throttle map will dramatically improve your Mustang's acceleration, shaving tenths off your quarter mile time while throwing you into the back of your seat every time you smash the gas. Automatic transmissions will see an even greater gain in acceleration and drivability, as the tune adjusts shift points and firmness.

  • Personalized

    For each and every Bama Tune, we ask you 19 questions about your specific Mustang, including your unique set up and intended use, in an easy to use web form. This information allows us to write an entirely custom tune just for your specific vehicle to ensure we deliver the most power and performance possible.

  • Proven

    Our Bama Custom Tunes are developed in-house on our Dynojet 224xLC chassis Dyno. Hours of research and development through street, track and dyno testing/datalogging left us with fully refined custom tunes. The Bama Performance team has exclusive access to our inventory of parts.

2 Bama Custom Tunes:

Free Tunes For Life

Purchase a Bama Custom Tuned device, and anytime you make a change to your Mustang that requires a new tune, just let us know. Bama will create a new custom tune, and the files will be emailed straight to you.
  • Perf TUNE

    Performance Tune V2

    Designed for the aggressive daily driver or weekend warrior. Bama's Performance tune provides more power than the stock tune along with increased throttle response and improved shift firmness.


    Race Tune V2

    Designed for Race use. Bama's Race tune delivers maximum horsepower and torque with aggressive transmission settings and a sensitive throttle response. 93 Octane or higher fuel is highly recommended.

**NOTE: Programming custom tunes may take 2-3 business days plus applicable shipping time. We recommend ordering other products separately to avoid delay. Heavily modified cars are not tunable with a mail order tune. Click for restrictions. Membership in the Tunes for Life program is valid for as long as you own the car that was originally tuned and is non-transferrable.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) SF4/X4 Power Flash Tuner
  • (1) One USB PC Interface Cable
  • (1) One Personalized ID Plaque
Installation Info
Tech Specs
Bama Custom Tuning at AmericanMuscle. Power. Performance. Personalized. Proven
  • Buy this Tuner & Submit your Mustang's Info
  • A Bama Performance Calibrator writes custom tunes just for your Mustang & Mods
  • Load 'em on your Mustang and GO!
  • As you add new mods, Bama will update your tune files for FREE!
    That's right, Free Tunes for Life!

Power and Performance. Now you can add dyno proven gains of 21 Horsepower and 34 ft-lb’s of Torque and improve the overall performance of your 1999-2004 GT or Bullitt Mustang with a SCT X4/SF4 Power Flash Tuner that includes 2 Bama Custom V2 Tunes. By optimizing the air/fuel ratio, adjusting ignition timing and tweaking variable cam timing, a Bama Performance Custom V2 Tune will squeeze out the extra power Ford left on the table. Automatic transmissions will see an even greater gain in acceleration and drivability, as the tune also adjusts shift points and firmness.

Increase Your Mod's Potential. 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. When making performance mods, you will need to recalibrate the vehicle's computer to realize their full potential. A Cold Air Intake kit alone on a 1999-2004 GT will net around a 5HP gain, but couple it with a Bama Custom V2 Tune and see dyno proven gains of 30HP and 40 ft-lb’s TQ or more.

Free tunes for life! Every customer that purchases a Bama Tuner is enrolled in the "Free tunes for life" program. Any time that you make additional mods to your vehicle, our team of SCT certified Bama Custom Tuners will create new tunes for you. Just send us a list of the part or parts you've added and we'll email the new tune files to you.

Bama V2 Custom Tunes. When you order a SCT X4/SF4 Power Flash Tuner, you aren't just getting a tuner - you are getting the tuner and 2 dyno-tested custom V2 Tunes that are written specifically for your Mustang and your particular modifications by Bama Performance. Bama even includes datalog reviews to ensure your vehicle is fully optimized.

  • Performance V2 (87-93 Octane) - The Performance Tune offers a seamless blend of power, performance and drive-ability. Improving the overall driving experience of your Mustang, the Bama Performance Tune improves vehicle acceleration, increases power throughout the entire RPM and improves throttle response with revised timing, fuel, and VCT maps. Automatic equipped vehicles offer an aggressive shifting map to provide more aggressive transmission settings. This tune is suggested for the aggressive daily driver that is looking for more "get up and go".

  • Race V2 (91-93 Octane, E85, Race Fuel) - The Race Tune is designed for maximum performance and ensures the largest increase in vehicle performance. Using the highest grade of fuel available in your area is mandatory as timing, VCT, fuel, and throttle response settings are very aggressive. Automatic transmission settings implement entirely new shift points, torque converter changes and firmness settings designed for Track use.

Nitrous (91, 93, E85, Race Fuel) - Our nitrous option can be added to any of our previously mentioned tune options, but only for 91, 93, E85, or Race Fuel.

Technical Note About Fuel. Use of E85 will require larger fuel injectors such as Injector Dynamics ID1300 or Ford Racing 47lb/hr Injectors. Unleaded race fuel can also be used, but Stoichiometric points must be supplied.

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 two custom V2 tune files by Bama Performance is specially designed to fit the 1999-2004 GT and Bullitt Mustang's equipped with the SOHC Modular 4.6L 2 valve V8 engine.

Programming custom tunes may take 2-3 business days plus applicable shipping time. We recommend ordering other products separately to avoid delay. Some heavily modified cars are not tunable with a mail order tune. Click for details.

SCT SF4/X4 Power Flash Tuner Features:

Chip/Handheld: Handheld Custom/Strategy: Custom
Memory Size: 4 GB Custom Tunes Held: 10
Year: 1999-2004 GT, 2001 Bullitt Model: SF4/X4 Power Flash Mustang Custom Tuner
Manufacturer: SCT Special Features: Full color LCD display
Built-in WiFi
Will it fit my Mustang?
  • GT - 99, 00, 01, 02, 03, 04
  • Bullitt - 01

Not compatible with Mac software

Most Helpful Reviews

Awesome Buy

I didn't really want to do any performance modifications to my Bullitt but wanted to wake her up a bit, this tuner did just that! Huge difference!!

Helpful (1)

I love it!!!!

I started with street level and it was great! Then I switched to performance and I was really impressed!!! Then I switched to race level and I was blown away!!!! I love this product!!! It's made my car ...

Read More
Helpful (1)

Overall Rating 4.6 out of 5 stars
Read All 100+ Reviews

Review & Install Video

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14 Questions / 8 Answers

Ask a Question

4.10 Gears/Shift Points on an Auto i had 4.10 gears put in, i want to know does the tune itself fix the spedometer? and also does my custom tune's change the shift points change for the gears ? or do i have to go about changing the shift points on my own


  • Within the tune, we will correct the shift points when notified of a gear change such as 4.10's and the speedometer will be fixed as well.


    Good Answer (2) (0)

Show 2 more answers Question Resolved

Would this tuner work with a 32 valve mach 1?


  • Yes, this tuner will work with the Mach 1 and we are able to provide custom tunes for the Mach 1 as well.


    Good Answer (2) (0)

Question Resolved

can the Bama SF4/X4 be used to turn off theft system I have a 2003 mustang GT, I've had several occasions when car would not start due to theft system. I would like to bypass/turn off the theft system


  • We can disable this system within a custom tune upon your request.


    Good Answer (1) (0)

Question Resolved

Do the custom tunes include pulley swap options? Metco 2.7 pulley


  • For supercharged cars, they require custom tunes and we can support most popular pulley swaps including the 2.7 Metco Pulley.


    Good Answer (0) (0)

Question Resolved

Dose this allow you to adjust you MAF sensor?


  • We can adjust your MAF calibration with our BAMA Custom tunes. Typically a new MAF is not required on naturally aspirated GTs. If you're looking to change your MAF for a certain setup, please give us a call so we can help get you the right part.


    Good Answer (0) (0)

Question Resolved

I have a 2002 mustang gt with stage 3 cams and a vortec supercharger and about ever bolt on mod you can think of, it has been tuned professionally, however I was thinking of getting this product to change things up a bit. Will this product erase the custom tune I have on the car when I use it or will it store the tune so I can reload it.


  • The tuner will treat the tune you have now as the stock tune and save it for you automatically when loading a new tune. To get BAMA custom tunes for your setup, please contact us first for a free consultation so we can review our supercharged vehicle process and ensure a proper tune.


    Good Answer (0) (0)

Question Resolved

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Customer Reviews (100+) Write a Review

Overall Rating 4.6

out of 5 stars

  • Performance Gain 4.4 4.4
  • Seat Of Your Pants Feel 4.369231 4.4
  • Ease Of Use 4.755725 4.8
  • Bang For Your Buck 4.438461 4.4
  • Preferred Tune: Performance

  • 5/5

    September 16, 2016

    Not good but great!

    Really woke up the car with the performance tune , wasn't expecting much since my car doesn't have much upgrades but it proved me wrong


    Year: 2001 Submodel: Bullitt

    Helpful (1) (0)

  • 4/5

    August 22, 2016




    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 18, 2016


    This tuner did exactly what it was supposed to do, tune my car. I bought a 2001 GT and the previous owner had started beefing it up a little (4:10 gears, TB,Intake,etc) but I wasn't sure what all had been done but I know it didn't run great. Ordered this tuner. the AmericanMuscle and Bama techs walked me through on how to give them the best info possible. I received the tuner with 2 custom tunes (87per-93rac) and I loaded the 87 octane performance tune on my car quickly and without any problems. It worked perfectly! Now I had to drive all over as to run out my gas so I could fill the tank with 93 octane and load my racing tune. Only problem at all is my speedo is still off about 7mph but all that requires is contacting Bama and they will email a new tune with the correct speedo settings. I highly recommend this tuner


    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 03, 2016

    04 Mustang GT auto

    This 04 mustang was bone stock. The two simple modifications of adding the Bama X4 tuner and changing the gearing to 4/10 made it a much more aggressive and fun to drive car.


    Year: 2004 Submodel: GT

    Helpful (1) (0)

  • 5/5

    May 19, 2016

    Bama X4/SF4 - Well worth the cost!

    Simply put, I think the 99-04 GT's are underrated to begin with, but after flashing my factory ECU with the 91 octane performance tune my little pony showed what a true race horse she was meant to be. A very noticeable gain in power, I can only imagine what the 91 race tune is capable of..! The only other mods I had already in use was a CAI and flowmaster 40's and short throw shifter. American Muscle.. thanks!!


    Year: 2002 Submodel: GT

    Helpful (1) (0)

  • 5/5

    June 01, 2015

    Bama SF4 Tuner

    I was one of the many skeptics who weren't sure if this product was worth it or not. Now I can say I definitely should have bought this long ago. I've only used the 87 octane street tune and the performance is much better than before. Tire chirping shifts at WOT, I love it. I have an automatic, so the shift points and pressure were adjusted and it shifts nice and quickly. Under the hood I have a CAI, bigger TB and a bigger plenum, and now the ECU knows what to do with the extra air. I can't wait to test out the 93 octane race tune. Mpg aren't any better because I can't keep my foot off of the pedal, but smiles per gallon increased ten fold. I definitely recommend this product.


    Year: 2003 Submodel: GT Great Falls, MT

    Helpful (1) (0)

  • 5/5

    May 14, 2015


    Awesome product, you will feel difference first three gears for sure.


    Year: 2002 Submodel: GT

    Helpful (1) (0)

  • 5/5

    March 25, 2015

    Great Product

    I have recently updated my mustang with a Pypes catback exhaust,SR cold air intake and the BBK 78mm throttle body intake. I installed all of these in stages and felt a difference after each step then I installed the the 93 performance tune. Install time I would say was less than 5 minutes. I really feel like it tied it all together the car runs smooth throttle response is right there and helped with the sharpening the shifting in my automatic transmission. I would very much recommend this product to go with any upgrades now and in the future. setup was easy tunes were pre loaded when I received it and the communication with Bama has been excellent. Like others I debated about getting this reading and reading.... 100 Percent Glad I decided to purchase it.


    Year: 2004 Submodel: GT Sanborn, NY

    Helpful (1) (0)

  • 5/5

    October 15, 2014

    2000 GT feels even better now than it did new!

    Excellent throttle response, feels like a horse that just wants to run, before it felt a little sluggish and aged but now it feels more alive. The race tune is the best but i run with the street tune mostly, only because 87 fuel is cheaper for me right now. Very much worth the money, and i love the fact that it has wifi and checks codes.


    Year: 2000 Submodel: GT California

    Helpful (1) (0)

  • 5/5

    October 04, 2014

    excellent product

    I recently received my tuner, I noticed a slight difference between the stock and sport and a slight difference between the sport and performance but I noticed a huge difference in the race tune. I would definitely recommend this product to anyone trying to get a little more out of their car and if you dont know much about tuning your car to get the most out of it like me this is an excellent way to go


    Year: 1999 Submodel: Cobra Texas, USA

    Helpful (1) (0)

  • 5/5

    July 22, 2014

    I love it!!!!

    I started with street level and it was great! Then I switched to performance and I was really impressed!!! Then I switched to race level and I was blown away!!!! I love this product!!! It's made my car extremley fast with the other mods I have with it!!!! I love driving it more now than ever!!


    Year: 2003 Submodel: GT Gardena, CA, USA

    Helpful (1) (0)

  • 5/5

    July 04, 2014

    Awesome Buy

    I didn't really want to do any performance modifications to my Bullitt but wanted to wake her up a bit, this tuner did just that! Huge difference!!


    Year: 2001 Submodel: Bullitt Florida, USA

    Helpful (1) (0)

  • 5/5

    May 12, 2014

    This thing rocks!!!

    This is by far the best seat of the pants upgrade I've done yet... Race tune is AWSOME really wakes up the 4.6, I choose performance for everyday driving.really helped transmission shift points as well. Get it you won't regret that you did...


    Year: 2002 Submodel: GT East Jordan, MI 49727, USA

    Helpful (1) (0)

  • 4/5

    April 22, 2014

    Features are awsome

    The plug and play instant horsepower,easy to use and perfevt for the price


    Year: 2000 Submodel: GT Utah

    Helpful (1) (0)

  • 5/5

    April 19, 2014


    You can feel the power gain on it. I felt my tires spin when I hit the gas from 20mph and all I have is an o/f x pipe with slp loudmouths and a cold air intake. I haven't been able to leave my foot off the gas since I got it. This is a great tune.


    Year: 2001 Submodel: GT Houston, TX, USA

    Helpful (1) (0)

  • 5/5

    April 23, 2014

    Get More Outta Your Upgrades with this Tuner!

    I recently had purchased an Upper Intake Plenum and 75MM Throttle Body. I expected for the throttle response to get better and a slight gain in HP. Then I added this tuner with it and got a lot more outta my car. The device is easy to use and the tunes are easy to install. It was well worth the money and the name plate that comes with it was of high quality as well. All the tunes are different but are precise to how Bama Performance wants them to be. The color display really sets this unit off and allows you to change colors of the display as well. It doesn't take a genius to follow the on screen instructions either. Another great product and customer service from AM and Bama Performance.


    Year: 2004 Submodel: GT Danville, IL, USA

    Helpful (3) (0)

  • 4/5

    May 04, 2014

    Good if you have mods!

    I bought this tuner for my bone stock mustang 01 gt auto. The only mod it has was a CAI. Installing it to the car was easy. The biggest difference, when the race tune is downloaded, is that the car shift at higher rpm than before. Also it shift very fast, making almost like a little power shift. On the negative side, I don't feel the 21hp promised. I would say that the only change was on the shifting. I guess when you have more mods this tuner with a custom bama tune will help you a lot, but if you are stock I think there are plenty of mods to do with 400$ buck. Thanks!


    Year: 2001 Submodel: GT Quebec, Canada

    Helpful (2) (0)

  • 5/5

    April 23, 2014

    Buy It Now!! Dont waste anymore time!!

    Just got it today and i have so much to say but ill make it simple. BUY IT NOW! I got 87 street, 87 perf, 93 race tunes. (its a DD) I havent even tried the 93 race but the 87 perf is worth the $400 bucks easy! Tire chirp in 2nd gear in an auto. I cant wait to run out of 87 so i can try 93 race. Stop wasting time like i did. I read every review, every forum for weeks. JUST DO IT NOW!! I drive a 04 gt vert auto, Pypes catted X, violator cat back, accufab 75mm tb


    Year: 2004 Submodel: GT Robstown Texas

    Helpful (2) (0)

  • 5/5

    April 22, 2014

    This is amazing tunner

    This tunner is so easy to use and I can just pull it out anytime time weather I'm going to race someone or just cruze fast down the highway you can really feel the extra horses your getting when you tune it I would recomond it to anybody with a mustang great deal and amazing results


    Year: 2001 Submodel: GT Stillwater, OK, USA

    Helpful (2) (0)

  • 5/5

    April 18, 2014

    awesome tuner!!!

    As soon as i got the tuner i loaded up the race tune... and boy did it make a difference to the power output of my 2000 gt. It deffinetly got me the max power out of all my proformance parts. Since loading up the race tune all my car wants to do is go sideways in 1st through 3rd gear : ) i recomend this tuner foranyone wanting more power and better mpg


    Year: 2000 Submodel: GT Bend, OR, USA

    Helpful (2) (0)

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