Description
Weistec Engineering ECU tune for the Porsche 911 (2017-2019) with the NA 4.0L Boxer 6. Weistec’s crank figures put the tuned engine at 535 hp and 357 lb-ft, up from 520 hp and 347 lb-ft stock, from a recalibration of the factory ECU software.
Key Features:
- Up to +15 hp / +10 lb-ft: Weistec’s crank estimate of 535 hp and 357 lb-ft, from Dynojet testing; real gains depend on fuel, conditions and supporting modifications.
- Stage calibrations: W.1 (Stock Vehicle) and W.2 (Race Exhaust fitted), so the calibration matches the hardware on your car.
- Optional add-ons: Cypher Plus and Porsche PDK TCU Tune, each selectable when you order.
- Reflash of the factory ECU: the original module is recalibrated rather than replaced with a stand-alone or piggyback unit.
- What changes: optimized fueling, optimized ignition timing and removed speed limiter.
- Tuning method: Cypher Plus: flashed at home from your phone with a Weistec Cypher Plus.
Fitment:
- Porsche 911 GT3 2017-2019 (991.2 Manual, 991.2 PDK) – NA 4.0L Boxer 6
- Porsche 911 GT3 RS 2018-2019 (991.2 PDK) – NA 4.0L Boxer 6
- Porsche 911 Speedster 2019 (991.2 Manual) – NA 4.0L Boxer 6
Not legal for sale or use on pollution-controlled motor vehicles; intended for competition use. Talk to us before ordering to confirm the right stage and tuning method for your car.

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