The Garrett PowerMAX Stage 2 G25-660 is a plug & play direct-fit turbo upgrade for VAG 2.0 TSI / TFSI EA888 Gen 3 engines. Developed to deliver maximum performance without compromising OEM fit. With professional tuning, this Stage 2 setup delivers up to 600 HP (447 kW, flywheel) and +59% more compressor flow compared to the OEM IS38. The turbo is fully assembled with calibrated electronic actuator and designed for high thermal loads up to 1050°C.
Advantages
• Direct fit Stage 2 upgrade with OEM mounting points
• Up to 600 HP power potential (flywheel)
• +59% compressor flow compared to IS38
• G-Series compressor and turbine aerodynamics
• Mar-M turbine wheel and stainless steel twin-scroll turbine housing up to 1050°C
• Latest generation double ceramic ball bearings
• Prepared for turbo RPM speed sensor (optional)
Technical specifications
• Type: PowerMAX direct-fit performance turbo
• Stage: 2
• Power range: up to 660 HP
• Engine capacity: 2.0 liters
• Maximum turbo speed: 165,000 rpm (Stage 2)
• Actuator: electronic OEM compatible
• Cooling: 4 water connections
• Bearing: double ceramic ball bearings
• Sealing: double piston rings
• Mounting: OEM drop-in
Turbo Tech Specs
• High-flow compressor housing with speed sensor port (optional)
• Turbine wheel: Mar-M alloy (15–20% more flow, up to 1050°C)
• Turbine housing: stainless steel twin-scroll, up to 1050°C
• Exhaust housing: OEM flange
• CHRA: V-band, individually positionable
Compressor
• Inlet: 54.00 mm
• Exhaust: 67.00 mm
• Trim: 65
Turbine
• Inlet: 54.00 mm
• Exhaust: 49.00 mm
• Trim: 84
Compatibility
• Audi A3 8V – 2.0 TFSI – 2013–2018
• Audi A3 8V Quattro – 2.0 TFSI – 2013–2018
• Audi S3 8V – 2.0 TFSI – 2013–2018
• Audi TT 8S – 2.0 TFSI – 2014+
• Audi TTS 8S – 2.0 TFSI – 2014+
• VW Golf 7 GTI – 2.0 TSI – 2013–2018
• VW Golf 7 R – 2.0 TSI – 2013–2018
Important (WARNING)
• Maximum permitted turbo speed 165,000 rpm (Stage 2)
• Use above this limit is at your own risk and may cause damage
• RPM speed sensor recommended to prevent overspeed
– Optional: 781328-0003 (sensor + gauge) or 781328-0004 (sensor)
– Sensors available separately
• Software tuning is mandatory to utilize performance safely
Contents
• Garrett PowerMAX G25-660 Stage 2 turbo
• Integrated electronic actuator
Frequently Asked Questions
Is this plug & play?
Yes, mechanically this is an OEM drop-in for the models mentioned.
Is tuning necessary?
Yes. Software is required for safe and optimal operation.
What is the advantage compared to IS38?
Much higher flow, better thermal margin, higher power reserve and faster recovery.
