Garrett 921474-5001S 

The Garrett 921474-5001S turbocharger is a high-performance, direct-fit replacement turbo engineered by Garrett — one of the world’s leading turbo manufacturers — and is commonly sold under the PowerMax™ or GT2563 designation. It’s designed as an upgrade to the OEM turbo on many 2.0-liter TSI EA888 Evo4 petrol engines found in recent Volkswagen, Audi, Cupra, and other VW-Group turbo cars.

This unit is a complete turbocharger assembly, including a calibrated electric actuator so it can replace the original turbocharger without major modifications (plug-and-play fitment). Compared to stock turbos, it offers significantly higher airflow and power potential while still using the factory mounting points.

Key Features & Specs

📌 Model / Series: Garrett PowerMax™ / GT2563 (Part No. 921474-5001S)
📌 Application: 2020+ Volkswagen Golf R, Audi S3, Cupra Formentor, and other vehicles with the 2.0L TSI EA888 Evo4 engine family.
📌 Performance Focus: Designed for higher performance output relative to OEM turbochargers.
📌 Power Capability: Rated up to around 550 HP (410 kW) turbo capacity — with real dyno results showing around 520 HP (383 kW) and approximately 576 Nm torque on a conservative tune.
📌 Flow Improvements:
• ~+20 % compressor flow over stock turbo
• ~+37 % turbine flow over stock turbo
These gains translate to better airflow and boost efficiency.
📌 Materials & Build:
• Modern compressor wheel aerodynamics
• Turbine wheel constructed of Mar-M alloy capable of very high temperatures (~1050 °C)
• Stainless steel turbine housing rated high heat resistance
📌 Turbo Internals: Integrated thrust bearing, electronic actuator, and fully machined speed sensor port (for optional speed monitoring).

How It Works

A turbocharger like this uses exhaust gas to spin a turbine that compresses incoming air. By compressing more air into the engine, more fuel can be burned — producing higher power and torque. Compared to a stock turbo, a performance-oriented turbocharger like the 921474-5001S can deliver more airflow and support higher horsepower figures while maintaining physical compatibility with the original engine layout.

This specific turbo is most often chosen by enthusiasts and tuners looking for a significant power increase over the factory unit without resorting to completely custom turbo systems. It’s typically combined with custom ECU tuning to safely unlock its potential.

Vehicle Fitment

Common compatible models include (but may not be limited to):

• Volkswagen Golf R Mk8 2.0 TSI EA888 Evo4

• Audi S3 8Y 2.0 TSI Evo4

• Cupra models with similar 2.0 TSI engines

• Volkswagen T-ROC R, Tiguan R, and others using the EA888 Evo4 turbo.