Cobb Tuning Access Port V3 (991 GT3 / GT3 RS)


Designed to fit

  • 2014 - 2016 Porsche 911 GT3 / GT3 RS (991.1)
  • 2018 - 2019 Porsche 911 GT3 / GT3 RS (991.2)

Product Details

The Accessport V3 is the world’s best  ECU tuning solution for Porsche. The simple DIY plug and play connection to the car’s engine management system via the OBDII port allows for any GT3 owner to apply improved engine and PDK calibrations to their favorite track weapon in a matter of minutes. Each Accessport comes with a collection of Off-The-Shelf maps for the engine computer as well as an optional upgrade for PDK tuning where applicable that combine to improve horsepower, torque, and transmission response and timing along with a list of unique custom features that will make you wonder how you lived without them before.

Key Features:

  • Comes pre-loaded with Stage 1 map
  • Everything required is included for simple installation
  • Easy to follow on-screen prompts help you identify your vehicle and available maps
  • Revert your ECU back to the way it was pre-software with the AccessPort
  • Read and clear OBD II to help diagnose issues
  • Store 50+ maps from COBBs vast OTS map database, or your favorite Cobb Protuner and quickly switch between them for any need
  • The AccessPort doubles as a multifunction gauge to monitor boost or any other live information directly from the ECU
  • Record multiple data channels simultaneously for in-depth evaluation of your engine performance. Stores up to 10 hours
  • Measure vehicle performance parameters such as 0-60 time, 60 foot, 1/4 mile ET's, and trap speeds, and digital dyno
  • Oil Service Reset and Inspection/Main Service Reset (991.2)

Simple Installation / Uninstall:  Everything is included for the simple installation!  Intuitive on-screen instructions identify your exact vehicle and available maps. Revert your ECU to exactly as it was before with the easy to use Uninstall option from the main menu.

Trouble Codes:  Read engine trouble codes to diagnose issues. Clear them when resolved.  Prevent expensive trips to the dealership.

Gauges: Use your Accessport as a gauge to monitor boost or any other live information, directly from the ECU.

Data Logging:  Record multiple data channels simultaneously for in-depth evaluation of engine performance.  Stores up to 10 hours

Performance Measuring:  Welcome to your own performance evaluation suite! Measure 0-60 mph time, 60 foot and ¼ mile ET’s. and Trap Speed.

Shift Light:  Set custom RPM warning lights for perfect shifts every time.

AP Manager:  Use your PC or Mac to manage maps, download recorded datalogs, or quickly update your Accessport.

Typically it is difficult to find large horsepower and torque gains by only changing a tune on a naturally aspirated sports car and the GT3 911’s don’t make absurd power like their Turbo brethren. Yet, the results we have been able to efficiently and consistently produce on all of the 991 GT3 variants is a testament to Porsche’s engineering and the enthusiasm and expertise of our own calibration team. There is no better bang for your buck method to modify your GT3 in order to get the absolute most out of such an incredible machine than what you can gain in a matter of minutes with an Accessport and one of our OTS maps. The results below speak for themselves.

Cobb Accessport (991 GT3) Dynos

Using 100 octane at the race track is certainly the best option for the best results, but do not worry. Every Accessport for a 991 GT3 or GT3 RS includes Stage1 OTS maps for 91, 93, and 100 octane to suit whatever fuel type is available. (95, 98, and 105 RON respectively for international ratings)

Plus you can easily change between each map in a matter of minutes as often as necessary so you are not stuck with only one octane choice.


    About Cobb Tuning

    COBB Tuning is an automotive engineering company dedicated to developing solutions that improve vehicle performance and the driving experience. COBB Tuning approaches design by taking the entire vehicle-platform into account as a complete system. Their ultra-high-quality products and services are professionally engineered, thoroughly tested and backed by industry leading customer service to ensure that they meet our objectives and exceed customer expectations.

    Originally founded in Rockwall TX by Trey COBB in 1999, COBB Tuning is now headquartered in Austin TX with premier tuning and service facilities in Plano TX, Portland OR and Fountain Valley CA, which offer a wide range of services including; project car consultation and building, vehicle modifications, dyno tuning, general maintenance and repair.

    From their initial Subaru focus, COBB Tuning has expanded its product offerings to BMW, Ford, Mazda, Porsche , Mitsubishi, Nissan and Volkswagen specializing in engine management electronics, intake tract components, turbocharged exhaust systems, turbo kits, drivetrain components and suspension components.

    Cobb Tuning is a one-stop firm with an enviable set of qualified skills and the exceptional ability to design, engineer, manufacture, test and service our own products under one roof. Whether it’s their state-of-the-art Accessport ECU programmer, exceptional bolt-on performance products, a professional tune, or consulting with build specialists on projects, COBB Tuning has the experience, skill and attitude to meet your specific needs.