Garrett G-XRace GXR55-88 103TW Super Core

Building a competitive setup for classes with a strict 88mm inducer rule requires maximizing airflow efficiency without stepping over tech inspection boundaries. The Garrett G-XRace GXR55-88 Super Core delivers this exact performance advantage. Built specifically for competitive heads-up drag racing platforms like X275 and Limited Drag Radial (LDR), this standard-rotation super core handles extreme boost profiles and high pressure ratios while maintaining reliable compressor efficiency.

By matching an 88.9mm forged compressor wheel with Garrett’s specialized 103mm turbine wheel configuration, this unit is built to extract maximum flywheel horsepower out of mid-to-large displacement race engines.

Core Engineering & Performance Benefits

XBoost Compressor Geometry: Engineered to optimize air velocity at massive flow rates. The redesigned wheel profile increases overall compressor flow by 21% compared to a legacy Garrett G55-1950 unit, giving you a wider power band under heavy boost.

Class-Specific Map Grooves: Available in either a 0.18-inch or 0.25-inch port-slotted map groove configuration. This allows you to fine-tune your inducer choke limits and compressor map layout based on your specific racing organization rules.

Ceramic Dual Ball Bearing Cartridge: The internal rotating assembly utilizes premium dual ceramic ball bearings to minimize friction and ensure fast transient response times down the track.

Flange-Style Speed Sensor Port: Features a pre-machined, integrated speed sensor port directly on the compressor housing. This allows for clean, bolt-in installation of an aftermarket shaft speed sensor to monitor operational limits.

Lightweight Aluminum Backplate: Replaces the heavy cast components found in standard industrial turbo units. The specialized backplate shaves rotating and static weight off the core assembly without sacrificing high-pressure sealing structural integrity.

Part Numbers & Map Groove Breakdown

Select your exact replacement super core from the configurations listed below:

Part Number: 934174-5008S | Garrett G-XRace GXR55-88 0.18in PS 103TW Super Core (0.18" Map Groove Configuration)

Part Number: 934174-5001S | Garrett G-XRace GXR55-88 0.25in PS 103TW Super Core (0.25" Map Groove Configuration)

Vehicle Fitment & Universal Platform Application

This is a universal, race-tier super core assembly. It does not bolt directly onto a factory manifold or downpipe. Final fitment relies completely on your choice of exhaust manifold flange, chassis clearance, and matching external turbine housing.

Target Output Range: Optimized for racing engines targeting anywhere from 1000 to 2350 flywheel horsepower.

Engine Displacement Compatibility: Designed to efficiently match airflow demands on custom power plants ranging from 3.0L up to 12.0L.

Turbine Compatibility Note: Built strictly for use with compatible Garrett GXR55 103mm turbine housing kits (available in multiple T6 or V-band A/R options). Note: This unit is not interchangeable with G55 106mm turbine wheel configurations.

Frequently Asked Questions

What is the maximum safe operational speed for this super core?

The maximum absolute shaft speed limit for the GXR55-88 is 84,000 RPM. Exceeding 84k RPM will cause extreme component stress and potential wheel failure. We highly recommend installing a dedicated turbo speed sensor into the integrated housing port to log and track shaft speeds on your ECU data logs.

What does the "Super Core" configuration actually include?

A super core configuration includes the fully assembled compressor housing, center housing rotating assembly (CHRA), forged compressor wheel, and 103mm turbine wheel. It arrives completely balanced and ready to go. It does not include the exhaust turbine housing, clamps, oil feed lines, or gaskets. Those must be purchased or matched separately based on your manifold layout.

Which map groove size should I choose?

The choice between the 0.18-inch and 0.25-inch port slot configuration is heavily determined by your specific sanctioning body's drag racing rules (such as X275 or LDR class specs) and the specific pressure ratio demands of your engine setup. Always double-check your series rulebook before finalizing your part number selection.

Add to wishlistAdd to compare

ESWG50 Electronic Straight Ext. Wastegate

SKU: TBSTS-0565-1002

Product information

Details...

Add to cart

Quantity Only 2 left in stock!

Add to cart

Add to wishlistAdd to compare

Garrett G-XRace GXR55-88 103TW Super Core Turbocharger