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Schropp Custom Tune for Existing SCT X4 – Mustang 2015–2023

Product information "Schropp Custom Tune for Existing SCT X4 – Mustang 2015–2023"

Already own an SCT X4 Flasher? You can order an individually created Schropp Custom Tune for your vehicle without purchasing another flasher.

The Custom Tune is created specifically for the respective vehicle configuration and supplied by email. It can be transferred to your existing SCT X4 using the SCT Device Updater and then programmed to the vehicle through the OBD-II port.

Please note: This product includes only the individually created Schropp Custom Tune. An SCT X4 Flasher is not included.

Before ordering: check the status of your SCT X4

If your SCT X4 is currently unmarried and not connected to a vehicle, we recommend updating the device to the current SCT software version before ordering. This allows required device and vehicle definitions to be updated before we create your Custom Tune.

If your SCT X4 is still connected to another vehicle or married, the device must first be unlocked. In this case, please order our SCT X4 Unlock Service before ordering the Custom Tune.

Important: Once the Schropp Custom Tune has been installed or the X4 has been connected to your vehicle, you should avoid unnecessary device updates. Updates do not change or improve the Custom Tune and may under certain circumstances cause issues with stored Tune Files, the Stock File or the device-to-vehicle pairing.

Schropp Custom Tune

Our Custom Tunes are intended for vehicles in factory configuration as well as vehicles with common standard modifications. The Custom Tune is individually created to match the engine, transmission, intake system and existing modifications.

The calibration is designed to provide improved throttle response and optimised power delivery. On vehicles with an automatic transmission, the transmission calibration is also adjusted to match the engine and transmission calibration to the vehicle configuration.

With the factory intake system, the power increase is approximately +25 hp for the 3.7 V6 and approximately +35 hp for the V8 models, depending on the engine. With an aftermarket intake system, the result depends on the individual vehicle configuration.

98 RON fuel is required for the Custom Tune.

Factory or aftermarket intake

Two configurations are available:

  • Factory intake
  • Aftermarket intake – please specify manufacturer/model

For an aftermarket intake, we require the manufacturer and exact model of the installed intake system in order to create the calibration.

For extensive engine modifications or configurations that differ significantly from stock, please contact us before ordering so that we can confirm whether the required calibration can be covered by this product.

Top-speed limiter adjustment

The electronic speed limiter can also be adjusted as part of the Schropp Custom Tune. The calibration includes a top-speed limiter adjustment appropriate for the vehicle configuration.

Information we need from you

Please use the “Vehicle Info” menu of your SCT X4 before ordering to obtain the required vehicle information. We require:

  • Vehicle Identification Number (VIN)
  • ECU Strategy
  • SCT X4 serial number
  • engine and vehicle model
  • transmission type
  • engine-related vehicle modifications
  • manufacturer and exact model when using an aftermarket intake
  • rear tyre size
  • modified final drive ratio, if applicable

Using this information, we create the appropriate Schropp Custom Tune and send the Tune File to you by email.

Note for model year 2021 and later vehicles: Depending on the ECU Strategy and software version, creation of the Custom Tune may take several days.

Transferring the Custom Tune to the SCT X4

The free SCT Device Updater is required to transfer the Custom Tune to the SCT X4. The software runs exclusively on Windows, so a Windows laptop or Windows PC is required.

We provide instructions explaining how to transfer the Custom Tune to your SCT X4.

Return to stock – vehicle-specific Stock File

We provide an original Stock File matched to the vehicle's ECU and software calibration. This allows the vehicle to be returned to its factory software calibration when required.

Important for vehicles that are already tuned:
If the vehicle already has a calibration from another tuner installed, that calibration is not used as the Stock File. Returning the vehicle to stock with the SCT X4 will restore the original factory calibration – not the previously installed tune from another provider.

If you want to retain the option of returning the vehicle to a tune previously supplied by another tuner, that calibration or an appropriate method of restoring it must be secured separately with the previous tuner.

Suitable for

  • Ford Mustang GT 5.0 V8 2015–2023
  • Ford Mustang 3.7 V6 2015–2017
  • Ford Mustang Bullitt 5.0 V8 2019–2020
  • Ford Mustang Mach 1 5.0 V8 2021–2023
  • Ford Mustang Shelby GT350 5.2 V8 2015–2020

Older SCT Flashers

Our current Custom Tunes are intended for use with the SCT X4. SCT X3 and older device generations are no longer supported by the manufacturer. Current software updates and regular technical or recovery support are therefore no longer available for these devices.

For this reason, we cannot guarantee that a newly created Custom Tune can be correctly transferred to and used with an SCT X3 or older SCT Flasher. If you wish to use an older device, please contact us before ordering.

Important: The Custom Tune is not approved for use on public roads. It is intended exclusively for motorsport use outside public-road traffic.

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Manufacturer information (GPSR)

Schropp Fahrzeugtechnik e.K.
In Schlattwiesen 18
72116 Mössingen
Deutschland
E-Mail: info@schropp-tuning.com
Website: www.schropp-tuning.com