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Supported Vehicles:

Porsche 991.2 GT3, GT3 RS

  • 2014-2016 991.1 Porsche GT3 WM
  • 2016 991.1 Porsche GT3 RS WM
  • 2018-2019 991.2 Porsche GT3 MT/PDK WM
  • 2018-2019 991.2 Porsche GT3 RS MT/PDK WM


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Table of Contents
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Map Revision:



991.1 GT3991.2 GT3 RS991.2 GT3991.2 GT3 RS
Stage0v100v100v100v100
Stage1v100v100v100v100





Required Accessport Firmware:

Map Availability:




  • Fuel Requirements:

    Each map lists the minimum required octane. A higher octane fuel can be used safely on a map designed for lower octane. DO NOT use maps designed for higher octane with lower octane fuels. Top Tier gasoline should be used where available.

    • Maps designated with "93" are for use with 93 and 94 octane/98 RON fuel or better.
    • Maps designated with "91" are for use with 91 and 92 octane/95 RON fuel or better.


    These maps are designed for E10 fuel (fuel with 10% ethanol content). For those who only have access to E0 fuel (fuel with 0% ethanol) it is recommended to use the "91" and "ACN91" octane versions of the maps and datalog the car to ensure your fuel is performing to the necessary level. This is especially important for those using Canadian 94 octane E0 fuel. 










991.1 GT3



Stage1 91 Octane / 95 RON



Stage1 93 Octane / 98 RON



Stage1 100 Octane / 105 RON




991.1 GT3Peak GainsMax Gains
Stage 1 91 Octane / 95 RON2%hp, 4%tq7% hp, 7% tq
Stage 1 93 Octane / 98 RON1%hp, 3%tq15% hp, 15% tq
Stage 1 100 Octane / 105 RON7%hp, 4%tq17% hp, 17% tq

Results may vary 


Stage 1

  • Intake Requirements: Stock air box with stock air filter
  • Exhaust Requirements: Stock


Peak Gains are reported as the absolute maximum value (HP and TQ) between the highest points of two plots.
Max. Gains are reported as the maximum TQ or HP gain at any point across engine speed range. 



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991.1 GT3 RS

Stage1 93



Stage1 100




991.1 GT3 RSPeak GainsMax Gains
Stage1 91 Octane/ 95 RONNot available when testedNot available when tested
Stage1 93 Octane / 98 RON5% hp, 3% tq17% hp, 17% tq
Stage1 100 Octane / 105 RON6%hp, 3% tq18% hp, 18% tq

Results may vary 


Stage 1

  • Intake Requirements: Stock air box with stock air filter
  • Exhaust Requirements: Stock


Peak Gains are reported as the absolute maximum value (HP and TQ) between the highest points of two plots.
Max. Gains are reported as the maximum TQ or HP gain at any point across engine speed range. 








991.2 GT3



Stage1 91




Stage1 93




Stage1 100





991.2 GT3Peak GainsMax Gains
Stage1 91 Octane/ 95 RON3% hp, 1% tq13% hp, 13% tq
Stage1 93 Octane/ 98 RON8% hp, 10% tq23% hp, 23% tq
Stage1 100 Octane/ 105 RON12% hp, 12% tq27% hp, 27% tq

Results may vary 


Stage 1

  • Intake Requirements: Stock air box with stock air filter
  • Exhaust Requirements: Stock


Peak Gains are reported as the absolute maximum value (HP and TQ) between the highest points of two plots.
Max. Gains are reported as the maximum TQ or HP gain at any point across engine speed range. 







991.2 GT3 RS



Stage1 93



Stage1 100


GT3 RSPeak GainsMax Gains
Stage1 91 Octane/ 95 RONNot available when testedNot available when tested
Stage1 93 Octane/ 98 RON6% hp, 3% tq13% hp, 13% tq
Stage1 100 Octane/ 105 RON7% hp, 11% tq22% hp, 22% tq

Results may vary 

Stage 1

  • Intake Requirements: Stock air box with stock air filter 
  • Exhaust Requirements: Stock



Peak Gains are reported as the absolute maximum value (HP and TQ) between the highest points of two plots.
Max. Gains are reported as the maximum TQ or HP gain at any point across engine speed range. 







Non-Performance Maps

Stage 0

  • Stock calibration. Factory map. Does Not Uninstall Accessport.





Closing Warnings and Precautions:

  • Use of inappropriate calibration/modification combinations will promote engine damage.
  • Seek the help of a professional COBB Protuner should your Porsche fall outside of OTS map requirements.
  • Top Tier gasoline should be used where available. Use of lower quality fuels can result in catastrophic engine damage.
  • For track events, we recommend adding at least 2 gallons of 100 octane fuel to battle high track temperatures.




Revision Notes:

Map VersionNote:
v100Initial Release Calibration. Adjusted ignition timing, airflow limits, throttle limits, and fuel as well as other tables that help maintain drivability and increase performance all while maintaining reliability.