Garrett G25-700 Turbocharger T25 / 0.64 A/R / GTX28 - WG

Bolt-On Upgrade for GT28R / Nissan SR20DET turbocharger with internal wastegate

The latest GEN 2 G25-585 / G25-700 turbo technology in a GTX28R-style turbine housing

Available only at TurboZentrum!

G25-700 turbocharger with GT28R / GTX28R / T28 turbine housing and 5-bolt GT28 downpipe connection! Plug & play replacement for all Garrett GT28 turbochargers – for example, as an upgrade kit for the Nissan SR20DET or CA18DET engine.

Garrett is launching a new line of G-Series II turbochargers. Key features include:

• New compressor aero technology for increased power and performance
• Direct upgrade for Gen I customers as complete unit, supercore, or CHRA only
• G-Series II uses Gen I compressor and turbine housings
• Up to 10% higher flow rate compared to Gen I at max pressure ratio and shaft speed
• Recalibration required to utilize the increased airflow for performance gains
• Improved efficiency at high flow rates

And the same features as GEN I:

• High-flow compressor housing with optional speed sensor port
• Mar-M turbine wheel (up to 1050°C resistant) with 15–20% more flow
• Stainless steel turbine housing rated to 1050°C
• V-band inlet and outlet on turbine housing
• V-band CHRA with adjustable rotation
• Twin ceramic ball bearings
• 4 water ports
• Dual piston ring seals
• Available in standard and reverse rotation

Power Range: Up to 700 HP
Displacement: 2.0 to 3.5 L

Note: Clockwise rotation

Compressor Specs:
Inducer: 54.00 mm
Exducer: 67.00 mm
Trim: 65
A/R: 0.70

Turbine Specs:
Inlet: 60.00 mm
Outlet: 55.00 mm
Trim: 84
Inlet Flange: T25
Outlet Flange (Downpipe): 5-bolt GT28R / GTX28R / T28 / Nissan SR20DET / CA18DET
Wastegate: Internal, 0.5 BAR / 7 PSI actuator

NOTE: The turbine housing is a specially manufactured product in premium D5S quality, designed to fit Garrett’s G25 series.

GENERAL DESCRIPTION OF THE GARRETT G-SERIES TURBOCHARGER

Whether you're a manufacturer or a high-performance car owner – now you can experience the power of motorsport legends and the durability of champions in your own vehicle! With Garrett's new G-Series II universal performance turbos, you get cutting-edge turbo technology. Developed with the same quality and precision that has driven motorsport legends for over four decades, G-Series II turbos are available in various housing sizes to suit your needs – as a complete turbo or a CHRA replacement to upgrade your Gen I unit.

Garrett's latest generation of turbochargers builds on the GEN I series, offering more efficiency and features. With significantly increased airflow at the same wheel size and extreme thermal durability in turbine wheel and housing, these turbos also include 4 water ports, dual piston ring seals, and provisions for speed sensors.

Standard and Reverse Rotation:
The revolutionary reverse rotation feature from GTX Gen II has been carried over into the G-Series. G-Series turbos are also available in reverse rotation!

Compressor Wheel:
All G-Series compressor wheels are CFD-designed, forged, and CNC-machined from high-strength aluminum alloys. The new G-Series II wheels deliver 10% more airflow than Gen I designs.

Compressor Housing:
The aero-optimized high-flow housings with integrated speed sensor ports are perfectly matched to the G-Series wheels. Improved recirculation systems from Gen I are retained and expanded in Gen II, significantly extending compressor performance by shifting the surge limit.

CHRA:
All Garrett G turbos come with water cooling and 4 ports – allowing two ports per side for flexible line routing. Just like Gen I, G-Series II includes twin ceramic ball bearings. New for Gen II: dual piston ring seals on both sides.

Turbine Wheel:
Made from high-performance Mar-M alloy, the turbine wheels withstand exhaust gas temps up to 1050°C. Despite identical wheel size, Gen II delivers 15–20% more flow compared to GTX.

Turbine Housing:
Cast from a special stainless steel alloy rated for continuous operation at up to 1050°C.

If this turbocharger is not listed as in stock, we may still have all components on hand to assemble it for you. Please call or email us to check current availability or explore the possibility of faster delivery times – timing often matters.

Custom Garrett Turbos

This turbocharger is supplied directly from the manufacturer. However, Garrett offers various flange and fitting options to match your vehicle. We’re happy to configure a custom Garrett turbo for you with your choice of compressor and turbine housings. Please contact us via phone, email, or our contact form.