Welcome to Muscleworks - we're a leading European supplier of high quality after market Ford S550 Mustang parts based in the UK. Please get in touch if you've any questions, or share this site to help spread the S550 love.

Store Address

7 Valley Road, Chandlers Ford, Hampshire, United Kingdom, SO53 1GQ

Contact Info

07800 700 222
Monday – Friday 9 AM – 5 PM

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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 data logging capabilities right through the device or when used in conjunction with a laptop and SCT’s Live Link software.

Note: For custom tuning applications please provide the vehicles 4 digit processor code with your order.
You can contact us in advance to see how to do this, or wait to receive your X4 and use it to “read” your vehicle

Warning: 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 local laws and regulations.

Product Benefits

  • Larger adjustable screen with landscape and portrait modes
  • Holds up to 10 custom tunes
  • On screen data logging and monitoring / livelink connection to laptop
  • Wireless connectivity

Fits Vehicle Models

2014 Ford Focus – ST
2013 Ford Focus – ST
2015 Ford Mustang 2.3 Ecoboost
2015 Ford Mustang 5.0 V8

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.


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