Porsche 911 GT3 4.0 ECU Tuning – Optimized Performance | 992 2018–Present

This isn't a generic flash. Our 992 GT3 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 car — real gains with factory-level refinement and reliability.

Estimated on a healthy car with known-good fuel:

• 503 hp → 533 hp — estimated gain of +30 hp
• 347 lb-ft → 377 lb-ft — estimated gain of +30 lb-ft
• Fuel maps available for 91, 93 and 100 octane
• Sharper throttle response and revised rev limits
• Calibrated for consistent performance in all conditions

The 992 GT3 runs the 4.0L naturally aspirated flat-six that revs to 9,000 rpm from the factory. Be realistic about the size of this step: roughly 6%, won through ignition timing, fuelling, throttle mapping and rev limits, because there is no boost to raise. Porsche's GT department calibrates these engines about as tightly as any road car they build, so what a flash gives you is sharper response and a cleaner top end, not a different car. If you want the very large numbers, that is what the turbo cars are for — and we sell those too.

What's included:

• Custom ECU calibration developed around your fuel, hardware and driving preference
• Optimized ignition timing, fuelling and rev limits for your specific car
• 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 car's mechanical condition and service history
• The octane you run day to day

Supported Vehicles:

• Porsche 911 GT3 (992) — 4.0L naturally aspirated flat-six, 2018 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 car 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 car 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 car, its modifications and its condition are required.
• Warranty — an ECU modification will likely void your factory powertrain warranty. On a current-model car still inside its original warranty period, that is a real cost to weigh.
• 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 car? Get in touch — we're happy to confirm the right calibration before you order.

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