G25-660 Supercore Garrett 54mm/67mm 0.70a/r 54mm/49mm

Garrett G-series turbochargers feature improved aerodynamics for maximum horsepower. Tailored to meet the demands of hard-core racing enthusiasts the G-series supercores combined with the G-series turbine housings create the most powerful small frame turbochargers on the market today.

Designed specifically for 1.4L to 3L engine displacements, the G25-660 turbocharger is rated at up to 660 horsepower. Highly efficient, this turbocharger will outflow all comparable products on the market.

Compressor Aero

Forged, fully-machined compressor wheel and new aerodynamics increase maximum horsepower output and boost response. The CFD (computational fluid dynamics) engineered compressor wheel increases airflow up to 15% for 60mm and 30% for 67mm with 79-80% efficiency. (Compared to GTX GenII)

Speed Sensor

The compressor housing features a fully machined ported shroud to help reduce compressor surge. A fully machined speed sensor port provides enthusiasts the option to add the new G Series speed sensor to measure turbocharger shaft speed, a key factor in determining ideal operating conditions.

Centre Housing

A new, one-piece centre housing and backplate increase durability and product safety by reducing the number of failure points associated with the turbocharger. The centre housing to turbine housing V-band connection allows for 360 degree orientation when installing with Garrett non-wastegated turbine housings.

Water Jackets

Four large water jacket ports increase cooling capacity and allow enthusiasts to customise water line routing to help improve the installation process. The turbocharger comes with two -6AN water fittings and two plugs.

Oil Passage

A single-stage oil passage directs pressurised oil to the new oil cavity ensuring proper bearing lubrication at both sides of the cartridge. Each turbocharger includes one -4AN oil restrictor fitting with a 1mm orifice to provide the turbo with the recommended 40psi of oil pressure.

Rotating Group – Twin Piston Rings

A shorter bearing cartridge allows us to incorporate twin piston rings on both sides of the shaft wheel assembly. This will reduce the likeliness of oil leakage at the seals from the centre housing to the compressor and or turbine stage.

Turbine Wheel Aero

The turbine wheel features improved aerodynamics to enhance flow and boost response. The new turbine wheel is made of Mar-M super alloy and is capable of handling exhaust gas temperatures up to 1050 degrees C. The new turbine wheel flows 15-20% more than GTX and has a peak efficiency of 74%.

Turbine Housings

All G Series Turbine housings are made from stainless steel to provide ultimate durability and temperature resistance up 1050 degrees C. Internally wastegated housings are compact, efficient, and designed with maximum bypass port size to reduce boost creep and provide better boost control.

Product Features:

• Fully-machined speed sensor and pressure ports
• Once piece centre housing and backplate
• 4 water jacket ports for customisable installation
• New turbine wheel aero constructed of Mar-M Alloy rated to 1055°C
• Stainless steel turbine housings for temperatures up to 1050° C | 1922° F
• Oil feed with restrictor and water fittings included
• Also available in standard rotation

Understanding the Name: G25-660
G designates Garrett
25 classifies the size of the frame.
The remaining 3 digits identify the max horsepower rating of the turbocharger. (ie 660)