Schropp Custom Tune for Existing SCT X4 – Mustang 1996–2004

Already own an SCT X4 Programmer? You can order an individually calibrated Schropp Custom Tune for your vehicle without purchasing another programmer.

The Custom Tune is created specifically for your 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.

Before ordering: check the status of your SCT X4

If your SCT X4 is currently unmarried and not linked to a vehicle, we recommend updating the device once before ordering. This allows the required device and vehicle definitions to be brought up to date before we create your Custom Tune.

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

Schropp Custom Tune

Our Custom Tunes are intended for vehicles in standard configuration and vehicles with typical basic modifications such as an upgraded air filter. The calibration is designed to provide improved throttle response and optimised power delivery. On automatic vehicles, transmission behaviour can also be incorporated into the calibration where supported by the vehicle's ECU strategy.

For extensively modified engines or configurations that differ significantly from standard specification, please contact us before ordering so that we can confirm whether the required calibration can be covered by this product.

Information required

Please use the “Vehicle Info” menu on your SCT device and provide the following information:

• Vehicle Identification Number (VIN)
• ECU Strategy
• SCT device serial number
• Any engine-related modifications
• Required fuel grade: 95 or 98 octane
• 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.

Transferring the Custom Tune to your SCT X4

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

We provide German-language instructions explaining how to transfer the Schropp Custom Tune to your SCT X4.

Vehicle applications

• 1996–2004 Ford Mustang 3.8 V6
• 1996–2004 Ford Mustang GT 4.6 V8
• 1996–2001 Ford Mustang Cobra 4.6 V8
• 2003–2004 Ford Mustang Mach 1 4.6 V8

Schropp Custom Tunes are available for 95 or 98 octane, depending on the vehicle application.

Older SCT programmers

Our current Custom Tunes are intended for use with the SCT X4. SCT X3 and older 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.

We cannot guarantee that a newly created Custom Tune can be successfully transferred to and used with an SCT X3 or older SCT programmer. If you intend to use an older device, please contact us before ordering.