Description
The GT2563S uses Garrett’s latest-generation compressor and turbine technology, delivering approximately 20% more compressor flow and 37% more turbine flow compared with the factory turbocharger. Garrett rates the turbocharger for up to 550 BHP, while published Garrett testing achieved 520 BHP and 425 lb-ft of torque on a conservative calibration.
Key Features
- Garrett GT2563S PowerMax Turbocharger:
A substantial upgrade over the factory EA888 EVO4 turbocharger, designed to support significantly higher airflow and horsepower while maintaining a direct-fit configuration. - 550 BHP Rated Power Capability:
Garrett lists the GT2563S PowerMax with a power capability of 550 BHP / 410 kW. Actual engine output depends heavily on tuning, fuel, supporting modifications, and operating conditions. - Increased Compressor & Turbine Flow:
Flow testing shows approximately +20% compressor flow and +37% turbine flow compared with the OE turbocharger, providing additional airflow capacity for higher-power applications. - Direct-Fit OEM-Style Design:
Engineered around the EA888 EVO4 platform to maintain an OEM-style installation while substantially increasing turbocharger capability. - Advanced Compressor & Turbine Technology:
Garrett’s GT2563S configuration uses a 51 mm compressor inducer / 63 mm compressor exducer and 58 mm turbine inducer / 50 mm turbine exducer. - High-Temperature Turbine Construction:
The turbine wheel is manufactured from Mar-M alloy, while the stainless-steel internally wastegated turbine housing is designed for temperatures up to approximately 1050°C. - Optimized Wastegate Flow:
The turbine housing wastegate channel has been optimized for improved flow and performance control at higher boost levels. - Integrated Speed Sensor Port:
The turbocharger includes a machined speed-sensor port, allowing turbocharger speed monitoring with compatible data-logging equipment and Garrett’s G-Smart Bluetooth Module. - Tuning Required:
This is a performance turbocharger upgrade and requires an appropriate ECU calibration. The factory calibration is not designed to take advantage of the turbocharger’s additional airflow and power capability.
Estimated Performance Gain
The GT2563S is capable of substantially more power than the factory turbocharger, but final output depends heavily on the ECU calibration, fuel system, intercooling, intake/exhaust configuration, octane, and supporting modifications.
Garrett’s published testing produced 520 BHP and 425 lb-ft of torque on a conservative tune. Other current EA888 EVO4 calibration packages have published outputs in the 478–543 HP / 409–435 lb-ft range depending on fuel and configuration.
| Configuration | Estimated HP Gain | Estimated Torque Gain | Estimated Output |
|---|---|---|---|
| Stock Turbo / Stock Tune | Baseline | Baseline | ~315–333 HP* |
| GT2563S + Conservative Tune | ~180–205 HP | ~110–140 lb-ft | ~500–525 HP |
| GT2563S + Optimized Performance Tune | ~200–240 HP | ~120–155 lb-ft | ~520–550 HP |
*Factory output varies by market, model, and calibration.
Reference: Garrett’s published dyno result of 520 BHP / 425 lb-ft was achieved on a conservative tune. Garrett also rates the GT2563S PowerMax at 550 BHP.
Actual results will vary depending on fuel quality, ECU/TCU calibration, intake and exhaust flow, intercooler efficiency, ambient conditions, drivetrain losses, and supporting modifications.
Why Upgrade?
The factory EA888 EVO4 turbocharger is optimized for OEM drivability, response, emissions, and factory power targets. As power demands increase, the stock turbo becomes a limiting factor for airflow and high-RPM power.
The GT2563S PowerMax provides additional compressor and turbine flow while retaining a direct-fit configuration. This allows the engine to maintain strong drivability while providing significantly greater headroom for higher boost and horsepower.
With the proper calibration and supporting hardware, the GT2563S can support power levels approaching Garrett’s 550 BHP rating, making it a strong foundation for a higher-output EA888 EVO4 build.
Compatibility
Garrett lists the GT2563S PowerMax PN 921474-5001S for the EA888 EVO4 platform, including:
- Volkswagen Golf R – 2022+ North America
- Volkswagen Golf VIII R 4Motion – 2020+
- Volkswagen Golf VIII Variant R 4Motion – 2021+
- Volkswagen T-Roc R 4Motion – 2022+
- Volkswagen Tiguan R 4Motion – 2020+
- Audi S3 Quattro – 2020+
- Audi SQ2 – 2021+
- Audi TTS Quattro – 2021+
- Cupra Formentor 2.0 TSI 4Drive – 2020+
- Cupra Leon 2.0 TSI – 2021+
- Cupra Ateca 2.0 TSI 4Drive – 2020+
Garrett identifies the EA888 EVO4 and OEM turbocharger references including 06Q145703C, 06Q145703F, 06Q145703G, and 06Q145703H for the listed applications. Always verify the OEM turbocharger part number and exact vehicle configuration before ordering.
⚠️ Important Notice
- ECU tuning is required for proper operation and to realize the performance potential of this turbocharger.
- Supporting modifications may be required depending on the desired power level.
- Actual horsepower and torque gains are estimates and are not guaranteed.
- Garrett’s published 550 BHP figure represents turbocharger power capability, not a guaranteed vehicle output.
- Professional installation and calibration by a qualified technician/tuner are strongly recommended.
- Always verify turbocharger part number, engine code, OEM turbocharger, oil/coolant connections, and supporting hardware before installation.
- Installation may affect emissions compliance, vehicle warranty, and operating legality depending on jurisdiction.
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