How much HP can I gain with a Porsche 911 991.2 GTS Stage 1 tune?

With a Stage 1 ECU tune, your Porsche 911 991.2 GTS 2015-2018 can go from 450 HP to 555 HP, a gain of +105 HP.

Is ECU tuning safe for my Porsche?

Yes. Westtuned uses manufacturer-calibrated ECU remapping with safe parameters. Stage 1 tunes require no hardware modifications and are fully reversible.

What is the difference between Stage 1 and Stage 2 for the 911 991.2 GTS?

Stage 1 delivers 555 HP with no hardware changes. Stage 2 pushes to 595 HP but may require supporting hardware modifications like downpipes or intercooler upgrades.

Porsche 911 991.2 GTS

Name: Porsche 911 991.2 GTS 2015-2018 ECU Tuning +105HP | Westtuned
Brand: Westtuned
SKU: WT-383
Availability: InStock

2015-2018 | 450 HP -> 555 HP

Porsche 911 991.2 GTS (2015-2018) Stage 1

POWER

450 HP

555 HP

+105 HP

TORQUE

550 Nm

640 Nm

+90 Nm

ORDER FOR STAGE 1

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What Will Your Car Feel Like?

Estimated performance improvements

— sec

0-60 MPH

Stock: —s → Tuned: —s

—

— sec

¼ Mile

Stock: —s → Tuned: —s

—

— HP/ton

Power-to-Weight

Stock: — → Tuned: —

—

Estimates based on performance data. Actual results may vary depending on conditions, fuel quality, and vehicle specifics.

Performance Curve

Stock Stage 1

Detailed Description

Porsche 911 991.2 GTS 2015-2018 Tuning Software by Westtuned

For Porsche 911 991.2 GTS owners who demand more from their 2015-2018, Westtuned offers custom ECU remapping software that transforms performance from the ground up. Every calibration is tailored to your vehicle's exact specifications, ensuring safe, reliable gains you can feel on every drive.

Using dyno-proven calibrations and safe air-fuel and boost targets, we offer Stage 1 software tailored to your exact hardware and driving style. Whether your Porsche 911 991.2 GTS 2015-2018 is stock or modified, our tuning optimises performance for both street and track use.

Stage 1 software pushes your Porsche 911 991.2 GTS 2015-2018 from the stock 450HP / 550Nm to 555HP / 670Nm — a gain of +105HP, achieved with no hardware modifications required.

Our calibrations are compatible with both stock vehicles and those equipped with aftermarket hardware — intakes, intercoolers, exhausts and more — ensuring maximum performance at every stage of modification.

Choose Westtuned for:

Custom ECU remapping for Porsche 911 991.2 GTS 2015-2018
Stage 1 performance software
Stage 1: 450HP → 555HP (+105HP)
Improved throttle response and torque delivery
Safe, data-driven tuning with reliability in mind

Experience the difference that properly calibrated ECU software makes — contact Westtuned and take the first step towards unlocking your Porsche 911 991.2 GTS 2015-2018's full potential.