GARRETT POWERMAX 2 DIRECT FIT PERFORMANCE TURBOCHARGER 2014 – 2019 Volkswagen Golf MK7 MK7.5 Audi A3 S3 2.0L TSI

Garrett Powermax 2 Turbocharger – Direct Fit G25-660 | 600 BHP Capable | VW Golf MK7/7.5 & Audi A3/S3 2.0L TSI Upgrade

Long Description 

The Garrett Powermax 2 Turbocharger is an extreme high-performance upgrade designed for the sophisticated UK performance car owner looking to transform their VW Golf MK7/7.5 R/GTI or Audi A3/S3/TTS 2.0L TSI (EA888 Gen 3) into a formidable 600 BHP-capable machine. This is a complete, direct-fit replacement turbocharger assembly, engineered by Garrett Motion using their advanced G-Series aerodynamics and dual ceramic ball bearing technology. It is a genuine bolt-on solution that provides a massive +59% flow increase over the factory IS38 turbo, delivering superior top-end power without the need for complex custom fabrication.

Pros & Cons

What the Product is Used For

This Powermax 2 turbocharger is used for extreme performance upgrades on the VAG 2.0L TSI MQB platform, replacing the smaller factory IS12, IS20, or IS38 turbo with a much higher flow G25-660 core. It's the central component for achieving a Stage 3 level of tune, pushing well beyond the typical limits of a hybrid turbo and providing the airflow needed to chase the 600 BHP mark. It fundamentally increases the volume and density of compressed air entering the engine, directly translating to a substantial increase in horsepower and torque.

Why We Like This Product – Reviewed by the MGM Team

At Moorfield German Motors, we've installed the Garrett Powermax 2, and it’s a genuine game-changer. The G25-660 core delivers a fierce, relentless pull right to the rev limiter. Crucially, the direct-fit design is not just a gimmick; it makes the installation process significantly less labour-intensive than a non-OEM frame turbo, saving our UK customers on fitting costs. This turbo allows for proper Stage 3 mapping, giving reliable, repeatable power that is perfect for fast road use and track days at circuits like Silverstone or Brands Hatch. The build quality, with the Mar-M alloy turbine, provides the confidence needed when you’re pushing the engine to its limits.

Tips for Correct Use

This turbo is designed as a bolt-on replacement, but professional installation by an experienced VAG specialist is essential. Due to the high flow rate, it is best used in conjunction with a fully upgraded high-pressure fuel pump (HPFP) and low-pressure fuel pump (LPFP) but not essential, a high-capacity intercooler, an upgraded intake system, and a performance downpipe (for maximum flow). A corresponding custom ECU calibration (Stage 3 tune) is mandatory to manage the increased airflow and fuel delivery safely. For DSG vehicles, a Transmission Control Unit (TCU) tune is required to raise the clutch torque limits.

Full Tech Specification 

Frequently Asked Questions (FAQs)

Q What is the power potential of the Garrett Powermax 2 turbocharger?

A The Garrett Powermax 2 is capable of supporting up to 600 BHP (Brake Horsepower) flywheel power with a proper Stage 3 tune and all necessary supporting hardware upgrades.

Q How does the 2 Powermax compare to the stock IS38 turbo found on the Golf R?

A This turbo offers a 59% increase in compressor flow compared to the stock IS38 unit, allowing the engine to produce significantly more power at the top end of the rev range.

Q Is ECU re-calibration or a tune mandatory after installing this turbo?

A Yes, a custom Stage 3 ECU calibration is absolutely mandatory to correctly manage the increased airflow and ensure safe, optimal performance and engine longevity.

Q What supporting modifications are required to achieve 600 BHP?

A To reach maximum power, you will require upgrades like a high-flow downpipe, a high-capacity intercooler, an upgraded fuel system (HPFP/injectors), and potentially forged engine internals depending on the tuner's recommendation.

Q Is it safe to use this upgrade on my VW Golf GTI or Audi A3/S3?

A It is safe only when installed by a professional and paired with a custom engine tune and all required supporting hardware to manage the significant increase in air-to-fuel ratio and boost pressure.

Installation available at our MGM HQ in Leeds.

Q Can I fit this myself as a competent home mechanic?

A While it is a direct bolt-on, installation should be handled by a qualified performance workshop due to the complexity of the VAG MQB platform and the critical nature of the turbocharger connections and clearances.

Installation available at our MGM HQ in Leeds.

Q Will I need to upgrade my DSG gearbox's software?

A Yes, if your car has a DSG gearbox, a Transmission Control Unit (TCU) software upgrade is essential to increase the clutch pack's torque capacity to handle the extra power and torque.

Q Does this turbocharger use a ball bearing or journal bearing core?

A The Garrett Powermax 2 utilises a dual ceramic ball bearing rotating group, which provides superior transient response and durability compared to traditional journal bearings.

Q What is the benefit of the Mar-M alloy turbine wheel?

A The Mar-M alloy is a high-temperature resistant material, allowing the turbine wheel to withstand extreme exhaust gas temperatures up to 1050C, improving reliability under sustained high-boost conditions.

Q What are the risks if I don't use high-quality fuel with this upgrade?

A Running this high-performance turbo on poor-quality fuel (below 98 RON/Super Unleaded) is a significant risk that can lead to pre-detonation, engine damage, and catastrophic turbo failure.

Buyer’s Guide: How to choose the best turbocharger for your UK Performance VW Audi Seat Skoda.

Choosing the best turbo depends entirely on your performance goals and budget for supporting modifications. If you are chasing ultimate power (500-600 BHP) for track or drag racing, a full-frame turbo like the Garrett Powermax 2 is the only way to achieve it, as it offers the highest airflow capacity. Be realistic about the total cost, as this upgrade necessitates thousands of pounds in supporting hardware and professional tuning. If your goal is a fast road car with power in the 400-450 BHP range, a hybrid IS38 turbo offers a better balance of cost, ease of installation, and required supporting mods. Always prioritise reputable brands like Garrett and professional installation from a trusted UK Performance specialist to ensure the long-term reliability of your high-performance German motor.