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V-Band Compressor Outlet Super Core for Maximum Race Power Builds
The Garrett G-XRace GXR38-64 64mm V-Band Super Core (GRT934173-5008S) combines Garrett’s advanced XBoost compressor aero technology with a V-Band compressor housing outlet for rigid, leak-free charge pipe connections in motorsport and extreme street applications. Rated up to 1,250 horsepower on 2.0L to 6.0L engines, the GRT934173-5008S delivers 23% more compressor flow than the G40-900 via enhanced pressure ratio capability and next-generation compressor aerodynamics. The V-Band outlet on GRT934173-5008S mates cleanly to aluminum intercooler piping without the need for hose connections, making it a preferred choice for purpose-built race platforms and clean engine bay builds.
Key Features
- GRT934173-5008S G-XRace GXR38-64 supercore with 64mm compressor inducer and V-Band compressor outlet
- XBoost Technology compressor aero delivers 23% greater flow over the G40-900 for extreme top-end horsepower
- Dual ceramic ball bearing CHRA for rapid spool-up, reduced friction, and long service intervals
- Inconel turbine wheel handles extreme exhaust heat in built high-boost race applications
- V-Band compressor outlet for rigid, reliable charge piping connections in professional builds
- Lightweight aluminum backplate reduces rotating assembly inertia for quicker response
- Machined speed sensor port for optional turbo speed monitoring via Garrett G-Smart sensor kit
- Compatible with G-Series and G-XRace turbine housing kits in T4 divided or V-Band inlet configurations
Specifications
| Detail | Value |
|---|---|
| Part Number | GRT934173-5008S / 934173-5008S |
| Model | G-XRace GXR38-64 |
| Compressor Inducer | 64mm |
| Compressor Exducer | 88mm |
| Compressor Housing Outlet | V-Band |
| 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 |
What’s Included
- 1 x GRT934173-5008S G-XRace GXR38-64 Supercore Assembly with V-Band compressor outlet
- Gasket kit
- Water fittings (AN6 nipples for coolant connections)
- Note: Turbine housing sold separately
About Garrett Motion
Garrett Motion has led turbocharger innovation for over six decades, developing the G-XRace platform specifically for motorsport applications demanding maximum airflow, reliability, and compressor efficiency. Garrett turbos are trusted by professional race teams across drag racing, time attack, circuit racing, and stage rally worldwide.
FAQ
What is the GRT934173-5008S?The GRT934173-5008S is the Garrett G-XRace GXR38-64 64mm supercore with a V-Band compressor outlet, capable of supporting 500 to 1,250 horsepower on 2.0L to 6.0L engines. It provides the rotating assembly and compressor housing and requires a compatible turbine housing kit to complete the turbocharger.
What is the difference between GRT934173-5008S and GRT934173-5009S?Both are GXR38-64 supercores with identical core specifications. The GRT934173-5008S uses a V-Band compressor outlet for rigid pipe connections, while GRT934173-5009S uses a CH (clamped hose) outlet for flexible piping. Choose V-Band for rigid aluminum charge piping or CH for silicone hose connections.
What turbine housings mate with the GRT934173-5008S?The GRT934173-5008S is compatible with Garrett G-Series and G-XRace turbine housing kits in 0.85, 0.95, and 1.06 A/R with T4 divided or V-Band inlet options, sold separately under part numbers 757707-0037 through 757707-0044.
Does this supercore require an external wastegate?Yes. The GXR38-64 platform uses external wastegates only. An external wastegate appropriate for your boost target must be sourced separately and is not included with the GRT934173-5008S.
What engines is the GRT934173-5008S compatible with?The GXR38-64 is a universal turbocharger supercore designed for 2.0L to 6.0L engines. It is not vehicle-specific and can be used across a wide range of platforms including 4-cylinder and 6-cylinder applications in both automotive and select marine and industrial uses.
Does this include the turbine housing?No. GRT934173-5008S is a supercore only. The turbine housing must be purchased separately to assemble the complete turbocharger unit.
Is the GXR38-64 a ball bearing or journal bearing turbo?The GXR38-64 uses a dual ceramic ball bearing center section for reduced friction, faster spool, and longer service life compared to conventional journal bearing designs.
What speed sensor options are available?Garrett G-Smart speed sensor kits are available separately. Street kit PN 781328-0001 includes a gauge; professional kit PN 781328-0002 does not. These install into the machined speed sensor port on the GRT934173-5008S backplate.
Installation Overview
- Select a compatible turbine housing kit in your preferred A/R and inlet flange style
- Pre-install oil feed and return fittings and coolant AN6 line fittings before mounting
- Mate the turbine housing to the supercore using the supplied gasket, torquing to Garrett specifications
- Connect V-Band compressor outlet to charge pipe using a V-Band clamp, aligning for optimal routing
- Install external wastegate to exhaust manifold or turbine housing dump port
- Prime oil feed line before startup and verify coolant loop is fully purged
- Initial startup at idle for minimum 5 minutes to circulate oil through the bearing system
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