Race-Grade Turbocharger Technology Built for Extreme Power Builds
The Garrett G-XRace GXR38-64 64mm CH Hose Super Core (GRT934173-5009S) represents the pinnacle of Garretts G-XRace platform, engineered specifically for serious motorsport and high-horsepower builds demanding up to 1,250 horsepower from a single turbocharger. The GXR38-64 supercore delivers exceptional compressor flow through its advanced XBoost Technology compressor aero, which increases flow capacity by 23% compared to the G40-900, enabling elevated boost pressure and superior intake efficiency at the top of the power curve. The hose-style compressor housing outlet on GRT934173-5009S provides maximum installation flexibility for custom intercooler piping configurations in demanding race car builds.
Key Features
- GRT934173-5009S G-XRace GXR38-64 supercore with 64mm compressor inducer and CH hose compressor outlet
- XBoost Technology delivers 23% more compressor flow than the G40-900 for superior high-end performance
- Dual ceramic ball bearing center section for reduced friction, faster spool response, and extended service life
- Inconel turbine wheel resists extreme exhaust temperatures in high-boost race applications
- Enhanced pressure ratio capability for pushing maximum boost levels in built motor applications
- Lightweight aluminum backplate reduces rotating assembly mass for quicker transient response
- Fully machined speed sensor port enables precise turbo speed monitoring during competition
- Compatible with standard G-Series and G-XRace turbine housing kits (T4 divided and V-Band inlet options)
- Rated up to 1,250 horsepower on 2.0L to 6.0L engine displacements
Specifications
| Detail | Value |
|---|---|
| Part Number | GRT934173-5009S / 934173-5009S |
| Model | G-XRace GXR38-64 |
| Compressor Inducer | 64mm |
| Compressor Exducer | 88mm |
| Compressor Housing Outlet | CH Hose (clamped hose style) |
| Turbine Inducer | 73mm |
| Turbine Exducer | 66mm |
| Horsepower Rating | 500 to 1,250 HP |
| Engine Displacement | 2.0L to 6.0L |
| Turbo Reference | 6470 |
| Max Speed | 125,000 RPM |
| Bearing System | Dual ceramic ball bearing |
| Turbine Wheel Material | Inconel |
| Compressor Wheel | Forged billet aluminum |
| UPC | Verify with Garrett distributor |
Whats Included
- 1 x GRT934173-5009S G-XRace GXR38-64 Supercore Assembly (rotating assembly with compressor housing attached)
- Gasket kit
- Water fittings (AN6 nipples for coolant connections)
- Note: Turbine housing kit sold separately
About Garrett Motion
Garrett Motion is the global leader in turbocharger technology, with over 65 years of engineering innovation across motorsport and OEM applications. The G-XRace line represents Garretts most advanced platform, developed for professional racing programs where horsepower, reliability, and compressor efficiency are critical at the extreme end of forced induction builds.
FAQ
What is the GRT934173-5009S?
The GRT934173-5009S is the Garrett G-XRace GXR38-64 64mm supercore with a CH (clamped hose) compressor outlet, rated up to 1,250 horsepower on 2.0L to 6.0L engines. It is the complete rotating assembly including the compressor housing, ready to mate with a compatible turbine housing kit.
What turbine housings are compatible with the GRT934173-5009S?
The GXR38-64 supercore is compatible with G-Series and G-XRace turbine housing kits in T4 divided or V-Band inlet configurations, in 0.85, 0.95, and 1.06 A/R ratios. Turbine housing kits are sold separately.
What is the difference between the CH hose outlet (GRT934173-5009S) and V-Band outlet (GRT934173-5008S)?
The GRT934173-5009S features a clamped hose-style (CH) compressor outlet suited for flexible intercooler piping connections, while the GRT934173-5008S uses a V-Band compressor outlet for rigid pipe connections. Both house the same GXR38-64 core assembly.
How much horsepower can the GRT934173-5009S support?
The GRT934173-5009S is rated for 500 to 1,250 horsepower on engine displacements between 2.0L and 6.0L, making it one of the highest-flowing 38mm frame turbos available from Garrett.
Does the GXR38-64 require an external wastegate?
Yes. The G-XRace GXR38-64 platform is externally wastegated. An external wastegate is required and not included with the supercore or turbine housing kit.
Whats the difference between the G-XRace and the standard G-Series platform?
The G-XRace GXR38-64 features Garretts next-generation XBoost compressor aero technology, delivering 23% more flow than the comparable G40-900 and enhanced pressure ratio capability for extreme race builds, while using the same turbine housing family as the G-Series for compatibility.
Is a speed sensor required for the GXR38-64?
A speed sensor port is machined into the GRT934173-5009S for optional speed monitoring. Garretts G-Smart speed sensor kits (PN 781328-0001 through 0004) are available separately for professional monitoring applications.
Does the GRT934173-5009S include a turbine housing?
No. The GRT934173-5009S is a supercore, which includes the rotating assembly and compressor housing only. The turbine (exhaust) housing kit must be purchased separately to complete the turbocharger assembly.
Installation Overview
- Select a compatible turbine housing kit (T4 divided or V-Band, 0.85/0.95/1.06 A/R) appropriate for your application and exhaust flange
- Install oil and coolant feed/return lines using the supplied AN6 fittings before mounting
- Mount turbine housing to the supercore using the supplied gasket and hardware, torquing to Garrett specifications
- Connect the compressor hose outlet to your charge pipe or intercooler inlet, securing with the appropriate clamp
- Install external wastegate to the exhaust manifold or turbine housing dump port
- Prime the oil feed line prior to first startup and verify coolant circuit is air-free
- Break in at idle for 5 minutes and check for leaks before full-boost operation
