Garrett PowerMax 1 GT2260S Turbo Upgrade

Garrett PowerMax 1 GT2260S Turbocharger | MQB EA888 Gen 3 Bolt-on Upgrade | Up to 485 HP Performance

Description

The Garrett PowerMax 1 GT2260S is an advanced, direct bolt-on performance upgrade specifically engineered for UK owners of the VAG MQB platform cars, including the Golf 7 R/GTI, Audi S3/TT, Seat Leon Cupra, and Skoda Octavia RS fitted with the EA888 Gen 3 1.8L/2.0L TSI engines. This turbocharger is designed to shatter the limitations of the OEM IS38 unit, delivering peak performance of up to 485 HP (flywheel) when paired with the correct supporting modifications and a professional ECU calibration. It isn't a mere hybrid; it's a completely redesigned Garrett GT2260S cartridge in an OEM-fit stainless steel housing, giving you immense power without the headache of custom fabrication.

Pros & Cons

What the Product is Used For

This Garrett PowerMax turbocharger is used for a Stage 3 performance upgrade on the VAG MQB EA888 Gen 3 platform. It replaces the factory IHI IS20 or IS38 turbo with a larger, more efficient Garrett GT2260S unit to substantially increase airflow, boost pressure, and ultimately, engine horsepower and torque. It is the core hardware component for owners seeking reliable, high-end power gains up to the 485 HP mark on UK-spec 99 RON fuel and even more on Ethanol blends (E85).

Why We Like This Product – Reviewed by the MGM Team

At Moorfield German Motors we have installed the Garrett PowerMax 1 multiple times. We run it on our 2018 Golf R shop car, and the results are fantastic. What we particularly appreciate is the OEM-level fitment paired with genuine Garrett GT-series core technology. The sheer quality of the materials, like the 1050C rated turbine components, offers peace of mind when pushing the car on track days. It delivers a serious surge of power in the mid-to-high RPM range that the smaller IS38 simply cannot sustain. It's the perfect blend of performance and reliability for the dedicated UK enthusiast.

Tips for Correct Use

This is a professional-grade component. Professional installation by an experienced UK VAG specialist is strongly advised to ensure correct fitting and calibration of the electronic wastegate actuator. The turbo is a direct bolt-on replacement, meaning no cutting or welding is required, but it is best used in conjunction with a full Stage 3 hardware package. This must include an upgraded downpipe, high-flow air intake, uprated intercooler, and a High-Pressure Fuel Pump (HPFP) upgrade to safely support the increased air mass. A bespoke ECU and DSG/TCU custom tune is non-negotiable for optimal performance and engine longevity.

Full Tech Specification – Factual Only

 FAQs 

Q What is the Garrett PowerMax 1 GT2260S turbocharger?

A It is a direct-fit, high-performance turbo upgrade for the VAG MQB EA888 Gen 3 engine platform, engineered by Garrett to deliver up to 485 horsepower.

Q How much extra BHP am I likely to gain from this product?

A With all necessary supporting modifications and a professional Stage 3 tune, you can expect power outputs of around 440-485 BHP, depending on your vehicle and fuel quality.

Q Can I fit this turbo to my stock Golf R without other upgrades?

A While physically bolt-on, this turbo is not safe to run on a stock tune and requires an upgraded intercooler, downpipe, intake, and bespoke ECU calibration for safe, reliable operation.

Installation available at our MGM HQ in Leeds.

Q Is it safe to use this turbo on my daily-driven Audi S3?

A Yes, the GT2260S is designed with high-quality, durable components like the 1050C rated turbine materials, making it a reliable choice for a high-performance daily driver when properly tuned.

Q What is the flow rate increase compared to the OEM turbo?

A The Garrett Powermax 1 provides a 17% increase in compressor flow compared to the factory IS38 turbocharger found on the Golf R and Audi S3.

Q What are the risks if I don't use a custom ECU tune with the turbo?

A Running this larger turbo without a custom ECU tune carries a significant risk of severe engine damage, as the factory software will not safely control the increased boost pressure and air/fuel ratios.

Q Will this turbo fit my VW Golf GTI Mk7?

A Yes, the Garrett PowerMax 1 is a bolt-on replacement for the IS20 and IS38 turbos, making it compatible with both the Golf GTI and Golf R Mk7/7.5 models.

Q Is the installation truly "plug and play" for a home mechanic in the UK?

A The turbo is a direct physical bolt-on, but due to the complexity of the job, the need for torque-spec adherence, and electronic wastegate calibration, professional installation is strongly recommended over a DIY approach.

Installation available at our MGM HQ in Leeds.

Q How does this compare to the Garrett PowerMax 2?

A The Powermax 1 (GT2260S) targets up to 485 HP with a quicker spool, while the Stage 2 (G25-660) is a larger turbo built for extreme performance, capable of up to 600 HP but with noticeably more turbo lag.

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

Choosing the best turbo for your MQB car in the UK tuning scene comes down to balancing your ultimate power goal against your driving style and budget. The Garrett PowerMax 1 GT2260S is the ideal choice for those targeting a reliable 430-485 HP who want minimal installation fuss thanks to its OEM bolt-on fitment. If you prioritize immediate throttle response and mostly drive on the street, a smaller, hybrid-style turbo might be preferable, albeit with lower peak power. However, if your goal is outright speed and a build pushing towards 500+ HP for track use, you must consider the more capable PowerMax 2 and budget for comprehensive engine hardware and transmission upgrades (like a DSG TCU tune and uprated clutch for manual cars). Always partner with a reputable UK tuner for the custom ECU calibration, as this is the single most critical factor for a successful, reliable build.