Fabspeed XperTune for Porsche 958 Cayenne Turbo / Turbo S (2011–2014)

Calibrate the early 958 twin-turbo V8 through the supplied handheld, using a file matched to its ECU and modifications. The published dyno comparison already had secondary catalyst-bypass hardware fitted, so it is not an untouched-car baseline. 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.958T.ET.
• Manufacturer reports 86 whp peak gain and a larger 99 whp difference at 6,000 rpm in its tested configuration.
• A bench-flash alternative requires prior arrangement.
• 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

• MyGenius Tuner (PDF)
• 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