The Garrett Supercore G-XRace GXR55-88mm is built for drag racing teams and serious performance enthusiasts competing in tightly regulated turbocharger classes who demand genuine Garrett engineering and class-legal specifications. This ported shroud configuration is purpose-built for competitors running in the X275 class, offering the exact combination of compressor and turbine hardware required to stay competitive at the top level. For racers who need a genuine, verifiable Garrett core built to exacting class standards, this is the platform to build around.
Specifications
- Compressor Wheel: 88mm
- Turbine Wheel: 106mm (full size)
- Ported Shroud Surge Slot Width: 0.18″
- Class Designation: X275
- Garrett P/N: 934174-5002S
- Also Known As: GXR55-88
Performance & Application
This Supercore is engineered specifically for competitors in the X275 drag racing class, where every spec must be verifiable and class-legal. The ported shroud design with its 0.18″ surge slot width works in tandem with the full size 106mm turbine wheel to deliver the airflow characteristics this class demands. Built on the GX-Race55 platform, this configuration is intended for racers who need genuine Garrett hardware backing their class-legal build.
Frequently Asked Questions
- What is the ported shroud surge slot width on this Supercore?
- The ported shroud surge slot width on this GXR55-88 Supercore is 0.18″.
- What turbine wheel size does this Supercore use?
- This Supercore uses the full size 106mm turbine wheel.
- What racing class is this Supercore designed for?
- This Garrett Supercore is designated for the X275 class.
- What does GXR55-88 refer to?
- GXR55-88 refers to this unit’s designation on the Garrett G-XRace55 platform, indicating the 88mm compressor wheel configuration.
For X275 competitors who require genuine Garrett engineering matched precisely to class specifications, the Supercore G-XRace GXR55-88mm delivers the verified hardware needed to compete at the top of the class.

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