COBB Tuning Accessport V3 for Porsche 997.1 GT3 & GT3 RS
The COBB Accessport V3 is the most flexible and proven ECU tuning upgrade available for the Porsche 997.1 GT3 and GT3 RS. Porsche’s factory ECU calibration is intentionally conservative; COBB’s OTS (off-the-shelf) maps unlock sharper throttle response, improved midrange torque, and smoother power delivery. As you add bolt-on performance upgrades, the Accessport automatically adapts with updated maps—making it the last tuning device your GT3 will ever need.
Installation is fast and simple: download your preferred COBB maps, connect the Accessport via the OBD2 port, and flash your ECU in roughly 20 minutes. The device stores your original factory tune, allowing you to revert to stock at any time.
Warning: Installing the Accessport over non-OEM or non-COBB software may cause ECU/TCU damage. Contact COBB Support if you have any questions.
Available OTS Maps
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Stage 1: For stock engine and intake with either stock exhaust or muffler bypass.
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Stage 2: For full aftermarket exhaust systems (Cup headers supported) with otherwise stock engine. Includes left-foot braking and a raised 8,550 RPM rev limit.
Additional functionality includes a valet mode (4,000 RPM limit) and an anti-theft mode that prevents the engine from starting.
COBB also provides a 100-octane performance map for maximum power when using high-octane race fuel.
The Accessport V3 features a large high-resolution full-color display, customizable multi-gauge layouts, interchangeable faceplates, and support for up to 100 calibration files. Configure the perfect race, street, or dyno gauge setup with extensive customization options.
Supported Vehicles
- 2007–2008 Porsche 911 (997.1) GT3 MT
- 2007–2008 Porsche 911 (997.1) GT3 RS MT
Accessport V3 Features
- Large, full-color high-resolution screen
- Customizable multi-gauge display
- In-vehicle mount with on/off switch
- User-customizable startup screen
- Interchangeable faceplates
