Porsche 911 GT2 3.6 TT ECU Tuning – M64 Optimized Performance | 993 1996–1998

This isn't a generic flash. Our 993 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:

• 430 hp → 473 hp — estimated gain of +43 hp
• 400 lb-ft → 425 lb-ft — estimated gain of +25 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 993 GT2 is the homologation car — the M64 3.6L twin-turbocharged air-cooled flat-six, rear-wheel drive only, stripped of the Turbo's all-wheel-drive hardware and built in tiny numbers. This is one of the most valuable cars in our entire catalog, and the calibration is developed accordingly: a clean, conservative recovery of the factory margin rather than an attempt to chase a headline figure.

Before you order, talk to us. Given what these cars are, we will not build a file for a 993 GT2 without speaking to you first about the car, its history and its current condition — and confirming the read process, which varies on air-cooled cars by year and market.

What's included:

• Custom M64 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
• Direct consultation before any work begins

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 full service history
• The octane you run day to day

Supported Vehicles:

• Porsche 911 GT2 (993) — 3.6L twin-turbocharged air-cooled flat-six, M64, rear-wheel drive, 1996–1998

How to order:

• 1. Talk to us first. Get in touch before ordering so we can confirm the right calibration and the read process for your car.
• 2. Order online. We ship you an OBDII data cable — typically 2–3 days to arrive.
• 3. Read your stock file and email it to us with a list of your current modifications.
• 4. 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, and on a thirty-year-old air-cooled turbo car that matters more than on anything else we tune. 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.

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