Fabspeed XperTune ECU Software for Porsche 981 Cayman GT4 (2015–2016)

The naturally aspirated 3.8-litre Cayman GT4 needs its own calibration. This XperTune service reads the supported 981 GT4 ECU through the diagnostic port, then uses your original file and vehicle details to prepare the replacement software. It is not the calibration for a 718 GT4 or GT4 RS.

Technical Details

• Manufacturer reference: FS.POR.981GT4.ET; 981 Cayman GT4 application.
• A vehicle-paired handheld transfers the original ECU read and the prepared calibration without routine ECU shipment.
• Plan on using a Windows computer for the file exchange; this process does not support macOS.
• Send the completed vehicle-information form with the original file so the fuel and installed hardware are recorded.
• The saved stock calibration can be restored on the same paired car. Check current ECU access before arranging programming.

Fabspeed Motorsport develops sports-car exhaust, intake and ECU-tuning products in Fort Washington, Pennsylvania, with dyno, road and racetrack evaluation.

Fabspeed Motorsport develops sports-car exhaust, intake and ECU-tuning products in Fort Washington, Pennsylvania, with dyno, road and racetrack evaluation.

Use restrictions

The calibration must retain required emissions controls. Fabspeed excludes requests to disable emissions equipment or its monitoring.

Installation Resources

• ECU programming guide (PDF)

Manufacturer Videos

Demonstration vehicles may have additional modifications. The selected configuration determines what is supplied; the video does not establish fitment or guarantee the same sound or output on another vehicle.

PMB Performance brings over 20 years of parts and fitment experience. Send your VIN, ECU reference, fuel and modifications if you need help confirming the application before ordering.

Fitment & Compatibility