Fabspeed XperTune for Porsche 991 GT3 / GT3 RS (2014–2016)

Match the first-phase 991 GT3 or RS engine and ECU to its calibration. The published stock-hardware test covers the RS, so its gains should not be transferred to every GT3 or modified exhaust setup. Based in Fort Washington, Pennsylvania, Fabspeed Motorsport designs exhaust, intake and ECU-tuning products for Porsche and other sports cars. Development includes evaluation on a dynamometer, on the road and at the racetrack.

Technical Details

• Manufacturer product reference: FS.POR.991GT3.ET.
• Manufacturer RS test shows approximately 6 whp peak gain and a 15 whp difference at 7,500 rpm.
• No unpublished GT3 or exhaust-package test result is invented.
• Includes the listed OBD-II handheld programming device, linked to one vehicle.
• Requires a Windows PC; macOS is not supported.
• Submit stock ECU data, fuel specification and a completed vehicle/modification form.
• Retained stock-file restoration follows the supplied procedure; confirm current file turnaround and any additional service fees.

Use restrictions

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

Installation Resources

• Handheld ECU tuning guide (PDF)

Manufacturer Videos

Fabspeed XperTune Handheld Tuner Tutorial | Including MyGenius Software Tutorial

Demonstration vehicles may have additional modifications. The selected product configuration determines what is supplied; a video does not establish fitment or guarantee a particular sound or output.

Need help matching this part? PMB Performance brings over 20 years of parts and fitment experience. Send your VIN, ECU reference, fuel and modification list so we can help verify the application before you order.

Fitment & Compatibility