Power Of Legends
Durability Of Champions
G35-990-G-Series-II Supercore
G-Series II Product Guide
Welcome to the official Garrett G-Series II Turbo Guide — your go-to reference for product selection, sizing, and application insights. This guide is built for distributors, kit builders, and tuning professionals who demand high performance, reliability, and easy integration.
Garrett, a History of Powering Motorsport Legends
Only the best of the best qualify to compete in prestigious Motorsport races, like the 24 Hours of Le Mans. It takes a combination of unparalleled skill, relentless hard work, and cutting-edge technology to reach the podium and achieve immortality. Those who succeed become legends.
For over 40 years, Garrett has been the name behind the legends of motorsport, powering the winners of the most prestigious races, including the Le Mans champions of the last 25 years. Our turbochargers are engineered by a team of 1300 engineers and tested across five R&D centers around the world, to deliver unmatched performance and reliability.
Harness the Power of Legends and Experience the Durability of Champions
Whether you’re a kit maker or an owner of a high-performance vehicle, now you can harness the power of motorsport legends and experience the durability of champions in your car with the NEW G-Series II universal Performance Turbos line from Garrett. Designed with the same quality and craftmanship that has powered motorsport legends for over 4 decades.
G-Series II turbochargers are available in multiple frame sizes to suit your individual needs, whether as a complete new turbo or as a CHRA swap to upgrade your G-Series I Turbo.
G-Series II Product Features
Product Features: • New compressor aero technology increases power and performance
• Direct upgrade path for Gen I customers with just a CHRA purchase
• G-Series II utilizes Gen I compressor and turbine housings
• Up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• See the compressor map overlays below for performance comparison
• Calibration required to take advantage of increased flow for a horsepower upgrade
• Increased efficiency at high flow rates
• Standard and reverse rotation configurations
• Mar-M alloy turbine wheel rated up to 1050° C
• Stainless steel turbine housings are rated up to 1050° C
• Oil restrictor and water fittings included
Sizes To Choose From
| G-Series II G25-585 HP: 300-585 Disp: 1.4L – 3.0LCLICK TO VISIT TURBO PAGE |
Compressor | Turbine | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | A/R | Inlet | Outlet | |
| 48mm | 60mm | 65 | 0.70 | 54mm | 49mm | 84 | .49 .72 | .92 |
T25 V-Band |
V-Band | |
| G-Series II G25-700 HP: 350-700 Disp: 1.4L – 3.0LCLICK TO VISIT TURBO PAGE |
Compressor | Turbine | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | A/R | Inlet | Outlet | |
| 54mm | 67mm | 65 | 0.70 | 54mm | 49mm | 84 | .49 .72 | .92 |
T25 V-Band |
V-Band | |
| G-Series II G30-725 HP: 350-725 Disp: 2.0L – 3.5LCLICK TO VISIT TURBO PAGE |
Compressor | Turbine | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | A/R | Inlet | Outlet | |
| 54mm | 67mm | 65 | 0.70 | 60mm | 55mm | 84 | .61 | .83 | 1.01 | 1.21 .83 | 1.01 1.06 |
V-Band T3 T4 |
V-Band | |
| G-Series II G30-825 HP: 475-825 Disp: 2.0L – 3.5LCLICK TO VISIT TURBO PAGE |
Compressor | Turbine | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | A/R | Inlet | Outlet | |
| 58mm | 71mm | 65 | 0.72 | 60mm | 55mm | 84 | .61 | .83 | 1.01 | 1.21 .83 | 1.01 1.06 |
V-Band T3 T4 |
V-Band | |
| G-Series II G35-990 HP: 550-990 Disp: 2.0L – 5.5LCLICK TO VISIT TURBO PAGE |
Compressor | Turbine | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Inducer | Exducer | Trim | A/R | Inducer | Exducer | Trim | A/R | Inlet | Outlet | |
| 62mm | 76mm | 65 | 0.72 | 68mm | 62mm | 84 | .61 | .83 | 1.01 | 1.21 .83 | 1.01 1.06 |
V-Band T3 T4 |
V-Band | |
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