Garrett Turbocharger G-Series II G35-990, 1.01 A/R V-Band / V-Band IWG, P/N: 934124-5002S

The Garrett G-Series II G35-990 is a purpose-built performance turbocharger engineered for enthusiasts who demand a direct, drop-in upgrade path from the original G-Series lineup without sacrificing proven housing compatibility. Built on Garrett’s latest compressor aero technology, this unit is designed for builders seeking measurable gains in flow and efficiency while retaining the trusted Gen I housing architecture. It’s the choice for serious performance builds that require both increased output and long-term durability under extreme conditions.

Specifications

• A/R Ratio: 1.01
• Turbine Housing Configuration: V-Band / V-Band with Internal Wastegate (IWG)
• Compressor & Turbine Housings: Utilizes Gen I compressor and turbine housings
• Turbine Wheel Material: Mar-M alloy, rated up to 1050° C
• Turbine Housing Material: Stainless steel, rated up to 1050° C
• Rotation: Standard and reverse rotation configurations available
• Compressor Flow Improvement: Up to 10% higher compressor flow compared to G-Series Gen I at peak pressure ratio and peak turbo RPM
• Inlet V-Band Flange (For Turbo Manifold): ATP-FLS-350
• Outlet V-Band Flange (For Down-pipe): ATP-FLS-351
• Oil Drain Flange: ATP-FLA-010
• Oil Drain Gasket: GRT-GSK-008
• Oil Drain Fasteners: MIA-FST-034
• Boost Pressure Port Fitting: ATP-FTG-198
• Speed Sensor Kit: ATP-ACS-032
• Garrett P/N: 934124-5002S

Performance & Application

This turbocharger is designed as a complete direct upgrade for existing G-Series Gen I customers, available as a full turbo unit, supercore, or CHRA-only purchase. The new compressor aero technology delivers increased power and performance along with increased efficiency at high flow rates, making this a strong option for builders looking to extract more from their current G-Series platform. Calibration is required to take advantage of the increased flow for a horsepower upgrade. Its Mar-M alloy turbine wheel and stainless steel turbine housing rating support sustained high-temperature operation for demanding, high-output applications.

Frequently Asked Questions

What is the A/R ratio of the G35-990?

The G35-990 features a 1.01 A/R ratio.

Does this turbo require recalibration to see performance gains?

Yes, calibration is required to take advantage of the increased flow for a horsepower upgrade.

Can this turbo be purchased as anything other than a complete unit?

Yes, it is available as a

Downloads

• Garrett-G-Series-II-Product Flyer