SCT X4 Mustang Tuner w/ Steeda Lifetime Certified Tunes (96-17 GT/EcoBoost)

2 Review(s)
*Over 20+ hp increase with tuning alone*. SCT's X4 tuning device is the latest evolution of the X series of tuning devices from SCT. SCT's X4 features great improvements in design and use.
SCT Tuner Trade-Up & Free Duffel Bag With Purchase - Ends 9/30
Part Number: 388 7015 TFL
7015 TFL

Choose Options

Write a Review


*Over 20+ hp increase with tuning alone*

SCT's X4 tuning device is the latest evolution of the X series of tuning devices from SCT. SCT's X4 features great improvements in design and use. This unit is a smaller, more compact device than the X3 it replaces.

The X4 features a larger, brighter, easy to read color screen with auto dim and user adjustable portrait and landscape modes. The device holds up to 10 custom tunes which can be supplied by SCT custom tuning dealers and also includes pre-loaded strategy files from SCT.

Now with built in Wifi, the device can be connected to any wireless network and will allow you to install any software updates released by SCT right through the device without a PC.

In addition, the X4 offers improved datalogging capabilities right through the device or when used in conjunction with a laptop and SCT's Live Link software.

  • Steeda does not have a 2015-2017 Mustang V6 custom tune, however the tuner does come preloaded with an SCT tune for the V6.
  • For custom tuning applications please provide the vehicles 4 digit processor code with your order.
  • Purchase of this item enrolls you in the Lifetime Tunes Program. To read more about the Lifetime Tunes Program , Click Here.

WARNING: Will Not Ship To California. Not approved for sale in California or states that require a California E.O. #. This part has been designed and is intended for off-road application only. Installation of this part on a vehicle that is driven on public roads may violate U.S. and Canadian laws and regulations. This product does not support any changes to the emissions systems on the vehicle including but not limited to catalytic converter and EGR deletes.

NOTE: . Federal and several state and provincial laws prohibit the removal, modification or rendering inoperative of any part that affects emissions or safety on motor vehicles used on public streets or highways. Steeda Autosports assumes no liability for any violations arising out of any federal, state or provincial emissions or safety requirements on motor vehicles arising out of the customer's modifications and/or use of Steeda products. It is the responsibility of the customer to determine if their modified vehicle complies with applicable laws.

This limited warranty is the only express warranty applicable to Steeda Autosports products. Other rights may arise or vary from state to state in the United States. Steeda is not responsible for any time for which you may lose the use of your vehicle, any inconvenience you might be caused, the loss of your transportation or any part thereof, or any other incidental or consequential damages you may have.

  1. New tuning devices are shipped out "blank". Upon receiving the device, utilize it to retrieve your vehicle's Strategy Code
  2. With the strategy code, visit our Custom Tune Request Form. Fill out the requested details on your car.
  3. Your Custom Steeda Tune will be emailed to you in approximately 3-5 days. Download the tune onto the device, flash your vehicle and enjoy the new performance.
Product Benefits
  • Larger adjustable screen with landscape and portrait modes
  • Holds up to 10 custom tunes
  • On screen datalogging and monitoring
  • Wireless connectivity

CA Residents: Cancer and Reproductive Harm WARNING

Hi I'm Gus with Steeda Autosports, and we're gonna show you how to use your SCT X4 programming device to tune your vehicle. First, connect the SCT X4 to your vehicles diagnostic port. This is the main menu on the SCT X4. The center button is your select button, this button allows you to select what you highlight on the screen. The up and down arrows will navigate the main menu options, the left and right arrows are used to navigate selection you make in each menu. Start by selecting program vehicle. The tuner will instruct you to turnkey power on without starting the vehicle. If you would like to exit from this menu use the left and right keys to highlight exit then press the select key. In this case, we're going to select and continue. Here is the main program menu. You will notice this device comes with preloaded tunes and also a custom tune. We always send out the device with a custom tune. The custom tune is what you want to select. Use the down key to highlight and select the custom tune. Every tune comes with options that can be used to dial in additional modifications. For instance, if your axle ratio is not stock you, you could change the parameters to match your axle ratio. We're not going to have you change anything here if your doing a custom tune as we've programmed these values for you in the custom tune. Use the right arrow to highlight approve and select. Here the menu asks if you want to install the default options that the program comes with, which is what you want to do, so we will select and continue. Now the programing of the tune has begun. It extremely important you do not turn key power off or disconnect the tuner from the vehicle until tuning has completed. The first step of the process is the tuner will upload and save your current factory program. Next it will extract the custom tune data to prepare it for installation. The last step is downloading the custom tune into your vehicle. After the tune is installed turn key power off and select done on your SCT X4. You may now safely disconnect the SCT X4 from your vehicle.
View Full Transcript

Fitment & Features


Manufacturer: SCT Tuning

Vehicle Fitment:

Fits Model Year: 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017

Customer Reviews

Rating Snapshot

Select a row below to filter reviews.

Average Customer Ratings


SCT X4 Mustang Tuner w/ Steeda Lifetime Certified Tunes - Fantastic!
Great product. Easy to use. I had a small technical glitch which Matt fixed for me. On a recent trip to VA, I averaged 27 mpg on the Interstate. An improvement of 2 mpg. The car is more responsive and much more fun to drive. Plus it pulls very strong throughout the rev range as a couple of MOPAR drivers recently found out. If you are thinking of getting one, do it now. Do not wait. I believe you will be happy with the results.
Did you find this helpful?  2 of 3 Found Helpful
Verified Buyer   from South Carolina on 4/8/2020
SCX Tuner with Steeda life time Tunes
I bought during the Holidays. I've since had 2 separate tunes sent too me 93 Octane & I'm adding the 302 Boss Intake on my 11GT so Steeda wrote that install tune also. Very easy too use I actually cant believe I waited this long!
Did you find this helpful?  3 of 4 Found Helpful
Verified Buyer   from Redford MI on 1/25/2020
There are no reviews for this product!

Related Items

Back to TOP
0 Items