APR Stage 3 GTS ECU Upgrade from Existing Stage 1 for 3.0T 991.2 Porsche 911 Carrera, Targa, Carrera T

  • APR Stage 3 GTS ECU Upgrade (New Customer) for the 3.0T 991.2 Porsche 911 Carrera, Targa, and Carrera T (APR-Stg3-NEW-991-POR-991.2)
  • Image 2
  • APR Stage 3, 91 Octane Power & Torque at wheels
1.00 LBS
APR products from etektuning.com can only be sold and shipped within the United States.
Calculated at checkout

PORSCHE PERFORMANCE PARTS: APR Stage 3 GTS ECU Upgrade from Existing Stage 1 for 3.0T 991.2 Porsche 911 Carrera, Targa, Carrera T

Product Details:

This APR Stage 3 GTS ECU Upgrade is the next step towards making more power for those who already own the Stage 1 ECU upgrade! This simple upgrade only requires factory Porsche Carrera GTS turbos and no other engine hardware modifications, and produces 520-615 HP with 524-594 FT-LBS of torque, depending on octane. Gains as high as 152-228 HP and 196-266 FT-LBS of torque are available throughout the power band. To get more power, the vehicle can be outfitted with an upgraded intake, cooling, or exhaust system.

  • Delivers up to 520-615 HP with 524-594 FT-LBS depending on octane
  • Max gains of +228 HP and +266 FT-LBS on E85
  • Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 Ethanol fuel grades
  • Quicker acceleration
  • Speed limiter removed
  • Left-foot braking / brake boosting added
  • Linear throttle maps
  • Switchable Normal and Sport/Sport+ Power Profiles
  • Auto Start/Stop defaulted to “off”
  • Added additional safety routines
  • Optimized thermal management and protection
  • No hardware required other than factory GTS turbos
  • Supports standard bolt on modifications
  • No TCU required to meet advertised torque figures
  • Designed specifically for owners of track and racing focused Porsches
  • Free lifetime updates
  • 30 day money back guarantee

APR Stage 3 GTS is available for 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades in North America, and 95 RON, 98 RON, 104 RON, 108 RON, and E60-E85 in the Rest of the World.

Please note, our E85 software is not a full flex fuel program. In this mode the engine is only designed to work on E85, as found directly at the pump, including both summer and winter blends from E60-E85. Using traditional pump fuels in this mode may result in engine damage. Do not manually blend with traditional pump fuel or race fuels or use race specific barrels of E85. To ensure proper E85 content levels, APR recommends using an E85 content sensor.

Additional Details:


  • 911 Carrera (991.2) 3.0T
  • 911 Carrera T (991.2) 3.0T
  • 911 Targa (991.2) 3.0T

APR’s ECU Upgrades are the best dollar-per-horsepower modification one can make to the 3.0T engine. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through APR’s optimization of the factory engine management system to take full advantage of the engine’s capabilities, without needing any end user adjustment. The software loads to the factory ECU through the OBD-II port, resulting in a clean and headache-free install.

APR ECU Upgrade Stages

APR’s ECU Upgrades support various octanes both with or without any hardware modifications. Each stage is fully compatible with an upgraded intake, intercooler, exhaust, or other minor bolt on modifications.

Porsche Mode Switching

Each upgrade offers a host of improvements beyond power alone. Using Porsche’s Normal, Sport, and Sport Plus modes offers varying levels of output while retaining all of the unique characteristics present in each mode. Sport and Sport plus modes give you full power and torque. Normal mode give you modest increase over stock. We’ve optimized boost, fueling, ignition, cams, and more to achieve greater power and torque in all scenarios.


In Sport Plus mode we’ve reduced turbo lag during reapplication of the throttle by building boost while off the throttle. We have linearized the pedal maps for a more predictable throttle response curve, which works exceptionally well on the track. We’ve enabled left foot braking, and brake boosting. The speed limiter has been removed. We’ve optimized the software to better handle larger wheels without excessive torque interventions. And finally we’ve inverted the start stop functionality so the vehicle starts with this feature disabled.



- Installation: Please contact Eurotek Tuning to schedule an appointment to install the ECU upgrade.

- Availability and ECU Compatibility: Stages, programs, and features may not be available for all ECUs.

- ECU Revision Notice: Multiple ECU revisions exist for each platform. APR software may be temporarily unavailable when factory updates are applied. An APR dealer can check availability in person, or over the phone if the ECU boxcode/revision is known.

Product Reviews

Write Review

This product hasn't received any reviews yet. Be the first to review this product!

Compatible With

Eurotek Tuning Logo
accepted credit cards