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EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System
EVT770 991.2TTS Performance System

EVT770 991.2TTS Performance System

Regular price $11,395.00 Sale

EVT770 Performance System
for the 991.2 Turbo S!

Porsche built the "580 hp" 991.2 Turbo S with uprated intake manifolds, fuel injectors, higher fuel pressure, and most notably larger turbo compressors compared to the previous 991.1 Turbo and Turbo S models. These factory improvements were a very welcome addition to the platform based on what we learned working with the 991.1 Turbo, although the claim of a mere 20 hp increase over the previous model didn't pass the sniff test. Indeed, when we did GPS acceleration testing on the street and baseline power testing on the dyno, we found the performance of the new Turbo S was extraordinary and well beyond the factory claims. 50-100mph, 60-130mph acceleration, and peak dyno numbers were all just shy of the performance of our 991.1 Turbo EVT640 kit, and we calculate the car is actually producing closer to 625 hp as tested with a completely stock car on 91oct fuel! With that knowledge we carried out a development program to build a range of performance packages aimed at improving and amplifying the strengths of the new Turbo S without sacrificing any of the everyday usability or reliability it is renowned for.

The EVT770 Performance System is the ultimate bolt-on package born from this development program. With a host of upgrades aimed at improving the breathing and cooling of the motor, the EVT770 reaches another level of performance--in the realm of the much lighter 991 GT2RS. On top of the EVT730 kit, the EVT770 adds IPD's Plenum and Y-pipe to improve midrange torque, and CSF Cooling's 4.5" Race Intercoolers to manage intake air temperatures. These additions extend the ceiling and range of the EVT770's performance, making it exceptionally fast over sustained full throttle pulls. For customers looking to race their cars on the street, ¼ mi, ½ mi, or anything between the EVT770 is the clear choice for performance.


  • Significant improvement in performance compared to stock (see test figures below)
  • Maintains Normal/Sport/Sport Plus functionality and smooth factory drivability
  • All OEM component protection and diagnostic functions intact
  • Aggressive exhaust note from the Ardent Performance Clubsport Exhaust while remaining civil at cruise and low loads
  • HJS Catalysts ensure no check engine lights and will pass OBDII emissions inspections
  • Exhaust note features prominent cracks/pops when decelerating in Sport mode
  • IPD Plenum and Y-Pipe improve response and midrange power
  • CSF Race 4.5" Intercoolers keep intake temperatures in check, maintaining maximum performance over long full throttle runs
  • Professional installation recommended, typical labor time ~6hr. Some trimming of OEM plastic intercooler shrouds required.
  • ECU tune can be performed on-site at Aw Designs

EVT770 Includes

Power Ratings

  • Stock power/torque as claimed by Porsche: 580 hp / 553 lb·ft
  • Stock power/torque as measured by EVOMS: 625 hp / 609 lb·ft
  • EVT770 91oct power/torque: 726 hp / 701 lb·ft
  • EVT770 93oct power/torque: 748 hp / 765 lb·ft
  • EVT770 100oct power/torque: 771 hp / 773 lb·ft

Dyno Charts

Dyno testing was performed on a Dynojet chassis dyno with the car in 'Rolling Road' mode and SAE correction factor. Charts below are generated based on raw data exported from test runs. Dynojet software will not calculate RPM or torque without an RPM pickup which is impossible to use on the 991 due to engine and wiring harness packaging. Dynojet data available upon request for transparency! Tests were performed in 4th gear in Sport Plus mode. Crankshaft power/torque derived by dividing by 0.8528.

Performance Figures

Performance tests were conducted using a VBOX Performance Box GPS data logger. Before and after tests were performed on the same stretch of road using the same procedures using the factory Michelin Pilot Sport 4S tires at factory pressures. Test conditions were 1500' ASL, 70-72°F.



EVT770 91oct

EVT770 93oct





















¼ mi





How to Purchase and Install

The EVT770 Performance System can be purchased and installed directly by us (Aw Designs or by one of our 991.2-equipped EVOMSit Flashing Partners worldwide. To install EVOMSit software on the 991.2, the ECUs be removed from the vehicle for the first, initial unlocking and reprogramming process. During this process we read out your car's stock programming code and create your tune based on that code and your requirements based on our questionnaire. The ECU can then be reinstalled in the car and used with no other adjustments needed.

Standard Package

Our Standard Package for $11,395 includes a single program (91, 93, or 100 octane AKI; or 95, 98, or 100 octane RON) installed on your ECU. Turning the ECU back to stock can be done by returning to us or by having the car reprogrammed at any Porsche dealership or properly equipped independent workshop.

Pro Package

For users wanting the ability to switch between multiple tuned files (eg. pump and race gas) or to turn their car back to stock, our Pro Package for $11,895 includes a second tuned file and our TUNEit OBDII Handheld Flash Tool. Upon the initial ECU removal/reinstallation being completed, the TUNEit tool is mated to the car during a brief process. After sending over the identification from the TUNEit tool, we create and send back the second program to be installed on the car and use at your discretion. Re-flashing the car between files is a simple process that takes a couple minutes to complete.

Standard Package users can upgrade to the Pro Package at any time for $695. Contact us for more details.