The Garrett Supercore G-XRace GXR55-91 is a genuine Garrett-engineered core built for the most demanding performance and racing applications. Designed as part of Garrett’s GX-Race55 platform, this Supercore is intended for serious builders and tuners who require authentic Garrett engineering as the foundation of a competition-grade turbocharger build. This is the trusted choice for enthusiasts who accept nothing less than genuine Garrett components at the heart of their build.
Specifications
- Model: GXR55-91
- Wheel Sizes: 91/149mm
- Series: GX-Race55
- Garrett P/N: 934174-5011S
Performance & Application
As a Supercore from Garrett’s GX-Race55 lineup, the GXR55-91 is built for builders assembling a high-performance turbocharger system around genuine Garrett internals. This platform is positioned within Garrett’s dedicated racing series, reflecting its intended use in serious performance and competition builds. Enthusiasts building a custom turbo setup around a proven Garrett foundation will find this Supercore to be an authentic starting point.
Frequently Asked Questions
- What is the Garrett part number for the GXR55-91 Supercore?
- The Garrett P/N for this Supercore is 934174-5011S.
- What wheel sizes does the GXR55-91 use?
- The GXR55-91 uses 91/149mm wheel sizing as reflected in its model designation.
- What Garrett series does this Supercore belong to?
- This Supercore is part of the Garrett GX-Race55 series.
For builders who demand genuine Garrett engineering at the core of their performance turbocharger build, the GXR55-91 Supercore delivers the authentic foundation this series is known for.

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