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

Market Price $429.99 You Save 7% ($30.00)
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  • Item 101200G99
  • MPN# 101200G99

In Stock Ships same business day. Choose options to add to cart

Features, Video & Details

  • 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

Review & Installation Video

Review & Install Video

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
About The Brand

About Bama


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

A must have!

Great product! A must have! Price is a little high but well worth the gain. If you are thinking about it, Get It!

Helpful (1)

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. ...

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Helpful (1)

Overall Rating 4.7 out of 5 stars
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24 Questions / 6 Answers

Ask a Question

How will Bama Tune know my upgrades? I want to maximize my vehicle and it's mods


  • When you purchase the tuner, you will fill out a form where you can include all the modifications you have done to your car. That way they can make the best custom tune for your specific build.


    Helpful (1)

Does bama tune for camshaft upgrades?


  • Bama can tune for camshaft upgrades as long as it is on a naturally aspirated Mustang.


    Helpful (1)

Why did this tuner go from "Bama X4/SF4 Power Flash Tuner w/ 3 Custom Tunes (99-04 GT, Bullitt)" to saying "Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)"?? (From 3 Custom Tunes to 2 Custom Tunes)


  • The three custom tunes Bama used to write were a race tune, performance tune, and a street tune. However the street tune was very similar to the stock tune from factory so they did away with this tune.


    Helpful (0)

Does bama tune for cams?


  • Bama can tune for camshaft upgrades as long as it is on a naturally aspirated Mustang.


    Helpful (0)

I have a 2000 GT and im looking to purchase a tuner my question is I currently run 100 wet shot of NX will there be a tune written to support that if I purchase?


  • BAMA would be able to write a tune for up to a 150 shot of nitrous, however, we would recommend contacting a BAMA specialist directly regarding your specific modifications to see if they could calibrate for those upgrades.


    Helpful (0)

dose this tunner come with 2-step??


  • Bama Performance can tune for a 2 step on the Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt).


    Helpful (0)

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Customer Reviews (100+) Write a Review

Overall Rating 4.7

out of 5 stars

  • Performance Gain 4.416107 4.4
  • Seat Of Your Pants Feel 4.362416 4.4
  • Ease Of Use 4.78 4.8
  • Bang For Your Buck 4.422819 4.4
  • Preferred Tune: Performance

  • 5/5

    January 14, 2017

    Immediately noticeable gains!

    While the updating process was a little difficult (notable driver issues with Windows 8.1), the tune itself only took about 5 minutes. It backs up your stock tune automatically when you choose which tune you want to run. Mine only came with an 87 octane performance tune but with the free tunes for life I can get the street or racing tunes. I was previously running a stock tune on my 2000 GT with a FRPP Intake Manifold, Airaid CAI, and SLP Loudmouth II catbacks. My car used to bog down/choke a little at idle even after replacing my IAC, new plugs, etc and after the tune, it runs as smooth as ever! It's like driving a newer GT model. If you have bolt-ons or plan on adding mods, this is a must buy for the best performance.


    Year: 2000 Submodel: GT

    Helpful (1)

  • 5/5

    January 13, 2017

    Well worth the money

    Ive had my eye on this tuner for a little over a year now. I was skeptical about the price but i finally decided to bite the bullet and grab one. After seeing all the tuning options it made it clear it was well worth the money. You can actually set your own parameters and make your own tune while in the car with the tuner. I already did the J Mod shift kit in my automatic and now after the tune it shifts even harder! I love how aggressive it made my GT


    Year: 1999 Submodel: GT

    Helpful (1)

  • 5/5

    November 23, 2016

    Must have Bolt-On Companion

    I have this Tuner with Three Tunes installed for all my current bolt-ons and it made a world of difference in my performance and really allowed me to gain the full potential of my bolt-ons. I recommend it for easy Bolt-on builds. I daily my GT and it just feels more alive and it is a very easy process to install the software, and use the Flash Tuner. The tune installation is smooth and quick. Just remember to read all the directions or call the customer support if you are unsure. They guided me in every single step.


    Year: 2003 Submodel: GT

    Helpful (1)

  • 5/5

    November 08, 2016

    Get it now

    I was sceptical that a ECU flash could make any noticeable difference. I was wrong. My 03 GT has a cold air intake and Flowmaster exhaust, other that that stock as far as performance. The custom tunes provided by Bama really woke up the sleeping beast. I just wish I had a dyno to see what I really gained, but it is noticeable. This is probably one of the easiest upgrades you can do to pick up what Ford left on the table.


    Year: 2003 Submodel: GT

    Helpful (1)

  • 4/5

    October 27, 2016

    Bama tuner

    This product works just as it is described. Very easy to use, so far I love it! Just a simple plug and play.


    Year: 2004 Submodel: GT

    Helpful (1)

  • 4/5

    October 25, 2016

    Worth the money

    Having a automatic this tuner was well worth it just for the shift firmness. Fells like a shift kit. I can also tell a power gian and have gotta a little better gas mileage. Free tunes for life tops it off as a complete package worth $400


    Year: 2003 Submodel: GT

    Helpful (1)

  • 5/5

    October 24, 2016

    The Bama tune does what it says it do

    I am happy with the product and when I hooked it up to the Mustang I get the most power out of my mods and I would recommend it to all the Mustang girls and guys


    Year: 2003 Submodel: GT

    Helpful (1)

  • 5/5

    October 11, 2016

    A must have!

    Great product! A must have! Price is a little high but well worth the gain. If you are thinking about it, Get It!


    Year: 2001 Submodel: Bullitt

    Helpful (1)

  • 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)

  • 4/5

    August 22, 2016




    Year: 2001 Submodel: GT

    Helpful (1)

  • 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)

  • 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)

  • 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)

  • 5/5

    March 31, 2016

    Great tuner

    I bought this to replace the old diablosport predator that came with my car when I bought it. Over the Predator I noticed it picked up a bit quicker, not a huge difference but a difference none the less. With this being newer with the times of technology as well, I will be able to grow in to it with each mod and tunes are free! Can't beat the customer service either these guys really are awesome! Love the tuner and the adjustability as well.


    Year: 2001 Submodel: Bullitt

    Helpful (1)

  • 4/5

    March 09, 2016

    Woke my 2V right up!

    Easy order and shipping. Plugged it in and off I went. 93 performance tune works great and the car runs awesome! Would buy again in a heartbeat


    Year: 2004 Submodel: GT

    Helpful (1)

  • 5/5

    January 11, 2016


    This tuner really changes your car it drives 100x better. It's feels like a new car. The tunes come quickly and it is easy for anyone to use. It looks quite nice as well. I would recommend this to anyone.


    Year: 2001 Submodel: Bullitt Vancouver Wa

    Helpful (1)

  • 4/5

    December 11, 2015

    W O W . . . .

    I have a 2001 GT automatic. It's got 3.73s and Flowmasters...otherwise STOCK. I bought a SCT X4 tuner with canned tunes to adjust my speedometer. Those tunes jacked up my shift points and firmness. I called SCT and talked to them a few times. They looked over my files and sent me new ones. Same problem. TERRIBLE drivability. Car held 1st too long, then wouldn't even stay in 2nd. Sent it back for a refund and bought a tuner from Bama. Told them I wanted the transmission to shift like stock, maybe a touch firmer, but stock shift points and driveability. W O W. They hit a home run on the first try. I loaded the Performance tune first... it shifts like a dream!!! Firm, but not harsh. And it uses ALL the gears in the transmission. In daily driving, at half throttle you can feel it wind through 1st, then 2nd, then 3rd... the way it's SUPPOSED to be!! I love it!! There definitely is improved throttle response and a small bump in power in the mid-range and above too. I want to try the Street tune next... they say it has more low end power. I'm impressed!!! 3 stars for "bang for your buck" because $400 is insane.. but 4-5 stars everywhere else!


    Year: 2001 Submodel: GT Lawrenceburg, KY

    Helpful (1)

  • 5/5

    December 09, 2015

    Love it.

    I would not hesitate to buy this. This is the second time I bought it, having had two different Mustangs, and I love it.


    Year: 2001 Submodel: Bullitt Georgia

    Helpful (1)

  • 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)

  • 5/5

    May 14, 2015


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


    Year: 2002 Submodel: GT

    Helpful (1)

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