GARRETT GXR38-64
Horsepower: 500 - 1150
Displacement: 2.0L - 5.5L
Features
G-XRACE UNIVERSAL PERFORMANCE TURBOCHARGER
GXR38-64 | 66mm Turbine
XBOOST TECHNOLOGY – HIGHER BOOST, GREATER POWER
• Improved pressure ratio capability enables increased boost levels for enhanced power output.
• High-flow efficiency delivers cooler, denser air to maximize horsepower and engine performance.
FLEXIBLE INSTALLATION OPTIONS
• Available with both V-Band and hose compressor outlet configurations, providing greater adaptability for a wide range of custom setups.
LIGHTWEIGHT PERFORMANCE ADVANTAGE
• Lightweight aluminum backplate to reduce turbo weight.
ADVANCED MONITORING CAPABILITY
• Integrated, fully machined sensor port for precise turbo monitoring & tuning.
Use PN 923586-0003 (G-Smart Module/ App) or Speed Sensor Kit 781328-0003 (street kit w/ gauge) or 781328- 0004 (pro kit w/o gauge).
BUILT FOR COMPETITIVE RACING CLASSES
• Designed for XWorld drag racing and classes with a 64.9 mm compressor inducer limit, ensuring compliance without compromising performance. (Always verify class regulations prior to purchase)
• Direct upgrade path and outline interchangeable with GXR45-73 for XFWD class.
ENGINEERING & INTELLECTUAL PROPERTY
• Garrett’s technologies are protected by a number of intellectual property rights in the USA and other countries, for example by U.S. patents US9850911B2; US10047607B2; US10502263B2.
Competitor Frame Size Reference: 6466 (64mm compressor inducer / 66mm turbine exducer)
Read about turbo system optimization
WARNING: Maximum allowable turbocharger speed is 125krpm. The use of this product above max turbocharger speed is at the owner’s risk, and can result in damage and premature failure. To protect the turbocharger from overspeed when operating, a speed sensor can be installed into the compressor housing to monitor shaft speed. Sensors sold separately. (click here for details)
Performance results of this product are highly dependent upon your vehicle’s modifications and tuning/calibration. The horsepower numbers represented above are calculated based strictly on choke flow of the compressor map (total turbo capability), which represents the potential flywheel horsepower.
IMPORTANT PRODUCT INFORMATION
“Garrett Performance Kits are professional aftermarket products only designed for certain racing vehicles driven on particular racing tracks and shall only be used on racing vehicles that will never be driven on public roads or highways. Garrett Performance Kits are not legal for the use in vehicles on public roads or other roads to which public road law applies. Any vehicle modifications using Garrett Performance Kits are AT YOUR OWN RESPONSIBILITY and AT YOUR OWN RISK. Only use Garrett Performance Kits in compliance with all applicable laws, regulations, and ordinances (including but not limited to emission, noise, operating license, performance, safety, and type-approval aspects). A vehicle modification using Garrett Performance Kits may particularly affect or void a vehicle’s warranty, operating license or type-approval. Moreover, only use Garrett Performance Kits in compliance with all applicable racing and racing track provisions. It is YOUR OWN RESPONSIBILITY AND RISK to ensure that your Garrett Performance Kit fits your vehicle and area of application. YOU MUST ENSURE LAWFUL AND SAFE OPERATIONS AT ANY TIME. You should particularly consult the owner’s manual and service manual of your vehicle. You should also contact your vehicle’s manufacturer to determine what effects modifications may have on important aspects such as safety, warranty, performance, etc. Only install and use Garrett Performance Kits if you have fully read and understood this important safety information and if you fully agree with the terms and conditions set forth therein.”
Learn More About Race Vehicle Setups
How To Select A Turbo Part 1
With over 35 Garrett turbos to choose, how do you select the right one? This provides some insight into the complicated process.
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G-XRace GXR38-64 64.9mm
Reference Data
| Supercore PN | Model | Turbo Reference | Horsepower Rating | Comp Inducer | Comp Exducer | Turbine Inducer | Turbine Exducer |
|---|---|---|---|---|---|---|---|
| 934173-5008S | V-Band Outlet | 6466 | 1150
1100 |
64.9mm | 88mm | 74mm | 66mm |
| 934173-5009S | Hose Outlet |
| Turbine Kit PN | A/R | Inlet | Outlet | Wastegate | Divided |
|---|---|---|---|---|---|
| 757707-0037 | 0.85 | V-Band | V-Band | External | N |
| 757707-0038 | 0.95 | V-Band | V-Band | External | N |
| 757707-0039 | 1.06 | V-Band | V-Band | External | N |
| 757707-0042 | 0.85 | T4 | V-Band | External | Y |
| 757707-0043 | 0.95 | T4 | V-Band | External | Y |
| 757707-0044 | 1.06 | T4 | V-Band | External | Y |
G-XRace GXR38-64 64.9mm
Compressor Map & Exhaust Flow Chart
Compressor Map
Exhaust Flow Chart
Compressor Map Overlay Explained
The compressor map overlay illustrates the airflow and pressure ratio differences between the G-XRace GXR38-64 V-Band compressor outlet and the Hose compressor outlet. In key operating regions, the compressor provides increased airflow capability at comparable pressure ratios, expanding the usable operating range and supporting higher horsepower potential where engine demand allows.
To fully realize these gains, ECU calibration is necessary to optimize performance when upgrading from a previous-generation turbocharger.
Engineering & Intellectual Property
Garrett turbochargers are engineered through extensive motorsports and OEM development programs. Garrett’s technologies are protected by a number of intellectual property rights in the USA and other countries, for example by U.S. patents US9850911B2; US10047607B2; US10502263B2.
G-XRace Turbine Housing Kits
G-XRace GXR38 turbine housing kits are available in three A/R. 0.85 A/R | 0.95 A/R | 1.06 A/R stainless steel housings with T4 divided or V-Band turbine inlet flanges.
Why Choose Garrett
Trust the name that’s been powering innovation for over 70 years. Garrett turbochargers are engineered to meticulous standards used in OEM production environments and validated through decades of motorsports and advanced engineering programs. With more than 130 million vehicles powered globally, Garrett delivers performance, reliability, and innovation you can trust.
Turbo Speed Monitoring
This Garrett turbocharger features a fully machined turbo speed sensor port. Monitoring turbocharger shaft speed is recommended to help prevent overspeed and protect long-term durability, especially when operating at higher performance levels. Compatible speed sensor kits are available separately. Use PN 923586-0002 (G-Smart Bluetooth Module / App) or Speed Sensor Kit 781328-0001 (street kit w/ gauge) or 781328-0002 (pro kit w/o gauge)
FAQ
Where can I buy the Garrett G-XRace GXR38-64 turbocharger?
Use the Garrett Dealer Locator to find an authorized retailer or distributor. Purchasing through an authorized source ensures product authenticity, technical support, and warranty coverage.
Will I need to retune my engine when installing a G-XRace turbocharger?
Yes. Performance results are highly dependent on vehicle configuration and ECU calibration. The increased airflow capability of the G-XRace compressor requires proper tuning to optimize performance, drivability, and durability.
Does G-Series I, G-Series II, and G-XRace product lines utilize the same turbine wheel?
Yes. G-Series I, G-Series II, and G-XRace turbochargers utilize the same turbine aero. They are designed to support a direct upgrade path for existing users who want to change between frame and models. If swapping between similar frame sizes, ie G42 – GXR42, users can interchange original turbine housings.
How does G-XRace differ from G-Series turbochargers?
G-XRace turbochargers feature updated compressor aerodynamics that provide increased airflow, pressure ratio, and efficiency compared to the other models. These improvements expand the usable operating range and support higher horsepower potential, where engine demand allows which is typically better suited for drag racing and xtreme horsepower applications.
Why is turbo speed monitoring recommended for high-performance applications?
Monitoring turbocharger shaft speed helps prevent overspeed conditions that can affect long-term durability. G-XRace turbochargers feature a fully machined speed sensor port, allowing users to monitor operating conditions, especially at higher performance levels.
Introducing G-XRace Series
