Garrett POWERMAX – Complete Bolt-On Upgrade Turbo
The Garrett POWERMAX series is an upgrade turbo that can be installed as a complete bolt-on.
Each component is specially developed to be a complete bolt-on and to allow the installation of auxiliary components that are standard equipment. Significant power potential is possible compared to the genuine turbo.
| Compressor Wheel | Turbine Wheel | |||
| Inlet Diameter (mm) | Outer Diameter (mm) | Outlet Diameter (mm) | Outer Diameter (mm) | |
| PowerMax Bolt-On Turbo | 47 | 60 | 45 | 50 |
Product Features
・Supports up to 447ps (on-vehicle measurement results)
・Calibrated genuine-shaped electric actuator and auxiliary parts are standard equipment
・Compressor flow increased by +32%, turbine flow by +50% compared to genuine turbo
・Garrett GTX Gen2 compressor aerodynamics adopted
・Superalloy Mar-M turbine aerodynamics (heat resistance temperature: 1050℃)
・Stainless steel turbine housing (heat resistance temperature: 1050℃)
・Latest generation journal bearings
・Thrust bearings are strengthened according to output
・Optional turbo speed sensor can be installed
Dyno Measurement Results

Measurement Conditions
Vehicle: VW Golf 8 GTi (EA888 Evo4)
Aftermarket downpipe
Genuine intercooler
Genuine fuel system
98 Octane gasoline
Compatible Models
| Manufacturer | Model Name | Year | Engine | Genuine Turbo Model Number |
| Volkswagen | Golf GTI | 2022~ | EA888 Evo4 | MGT1754KLSXZ |
| Audi | TT 45TFSI quattro | 2021~2023 | EA888 Evo4 | MGT1754KLSXZ |