Porsche Cayenne Turbo S 4.8 TT V8 ECU Tuning – Optimized Performance | 958.2 2016–Present

This isn't a generic flash. Our 958.2 Cayenne Turbo S 4.8 calibrations are developed in-house, optimized on the dyno, and tested on the street and track. Every map is built around your fuel, your hardware and how you actually drive the vehicle — maximum power with factory-level refinement and reliability.

Estimated on a healthy vehicle with known-good fuel:

• 560 hp → 600 hp — estimated gain of +40 hp
• 590 lb-ft → 650 lb-ft — estimated gain of +60 lb-ft
• Fuel maps available for 91, 93 and 100 octane
• Adjustable throttle response and boost timing
• Calibrated for consistent performance in all conditions

The 958.2 Cayenne Turbo S runs the 4.8L twin-turbocharged V8 in its highest factory state of tune. Porsche had already taken most of the calibration margin building the Turbo S, so the step here is smaller than on the standard Turbo below it — both end up at the same place. If you are choosing between the two, the standard Turbo is the better value from a flash precisely because it starts lower.

What's included:

• Custom ECU calibration developed around your fuel, hardware and driving preference
• Optimized boost, ignition timing and fuelling for your specific vehicle
• Throttle response and drivability refinement
• Fuel map matched to the octane you actually run — 91, 93 or 100
• OBDII data cable shipped to you
• Same-day file turnaround once we have your stock read

What we need from you:

• Your factory stock file, read with the cable we send you
• A complete list of current modifications
• Vehicle details and VIN
• An honest description of the vehicle's mechanical condition and service history
• The octane you run day to day

Supported Vehicles:

• Porsche Cayenne Turbo S (958.2) — 4.8L twin-turbocharged V8, 2016 to current

How to order:

• 1. Order online. We ship you an OBDII data cable — typically 2–3 days to arrive.
• 2. Read your stock file. Plug the cable into your OBD port, upload your factory file, then email it to us with a list of your current modifications.
• 3. Get your file back the same day. We email your custom calibration back the day we receive your stock read — and we'll make sure you're happy with it.

In the Southern California area? Get in touch and we can tune your vehicle in person instead.

Before you order:

• Power figures are estimates, not guarantees. Results vary with fuel quality, altitude, ambient temperature, mechanical condition, supporting modifications and dyno methodology.
• Mechanical condition — tuning raises cylinder pressure and driveline load. The vehicle must be sound first. Pre-existing faults revealed or accelerated by tuning are not our responsibility.
• Accurate information required — we build the file from what you tell us. An unmodified stock read and an honest description of the vehicle, its modifications and its condition are required.
• Warranty — an ECU modification will likely void any remaining factory powertrain warranty.
• Legal use — certain calibrations are for off-road and competition use only. Compliance with federal, state and local emissions law is the buyer's responsibility.
• Risk and liability — the customer assumes the risk of modification. Our liability is limited to the price of the tuning service.

Note: Tuning services are non-refundable once the file has been delivered. The service is complete at delivery. Full terms are on our Terms of Service page.

Questions about your specific vehicle? Get in touch — we're happy to confirm the right calibration before you order.

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