Porsche 911 GT2 3.6 TT ECU Tuning – Optimized Performance | 996 2002–2003

This isn't a generic flash. Our 996 GT2 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 — maximum power with factory-level refinement and reliability.

Estimated on a healthy car with known-good fuel:

• 456 hp → 550 hp — estimated gain of +94 hp
• 458 lb-ft → 511 lb-ft — estimated gain of +53 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 996 GT2 runs the 3.6L twin-turbocharged Mezger flat-six — the same racing-derived architecture as the 996 Turbo, but rear-drive, lighter, and fitted with larger turbochargers and uprated intercoolers from the factory. That hardware is why this is one of the biggest flash gains in the entire Porsche range: nearly 100 hp with nothing bolted on. This calibration is for the 2002–2003 456 hp car. The later 477 hp GT2 takes a different file.

What's included:

• Custom ECU calibration developed around your fuel, hardware and driving preference
• Optimized boost, ignition timing and fuelling 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 GT2 (996) — 3.6L twin-turbocharged flat-six, 456 hp, 2002–2003

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. On a 996-generation turbo car the factory coolant pipes are worth confirming before adding power; the original bonded pipes are a documented failure point. 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 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 car? Get in touch — we're happy to confirm the right calibration before you order.

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