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991 GT3/GT3RS EVOMSit Tuning
Product Type: Software
Application: 991 GT3 / RS

Price:$ 2345

» Questions? Click here!

The EVOMSit performance software for the Porsche 991 GT3 is a simple yet effective way to improve the performance of a completely stock or slightly modified 3.8L engine. Our rigorous testing, attention to details and stringent quality control ensures this upgrade is in a league of its own in terms of power and engine safety. Thoroughly tested on both the street and racetrack with both 91 and 93 octane pump fuels. The seamless integration of our software tuning enhances the overall power and drivability of this engine for uncompromised performance. This is done via the use of our hand-held upload/download programmer OBDII tool so no ECU removal is required. OBDII tool/software also comes with a code reader for diagnostics.

EVOMSit ECU Features include:
- Stage 1 software programmed for stock exhaust / standard OEM catalysts
- Stage 2 software programmed for aftermarket exhaust / standard OEM catalysts
- Takes advantage of the untapped potential of the engine without excessive mechanical stress
- ~17 HP / ~10 TQ Gain Software Alone
- Dyno Tested on 91 Octane Fuel. 93 Octane mapping yields slightly higher power gains
- All engine protection functions remain intact
- OBDII diagnostic capability is fully retained
- Calibrations for both 91 octane (95 RON) and 93 octane (98 RON) specific fuel
- Improved throttle response / overall drivability
- Extensively tested, performance validated
- Flash at home in your garage with the EVOMSit hand-held tool and a PC laptop

Dyno Plots for 3.8L 991 GT3

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