The Garrett GTX4594R is a large-frame, dual ball bearing turbocharger built for serious power builds that demand massive airflow without sacrificing response. Engineered as part of Garrett’s GTX-R series, it’s designed for enthusiasts and builders chasing four-digit horsepower goals on a proven, externally interchangeable platform. Whether stepping up from a GT42 or GT45 series turbo or building a new high-output setup from scratch, the GTX4594R delivers the flow capacity to get there.

Specifications

• Compressor Wheel Inducer: 70.3mm
• Compressor Wheel Exducer: 94mm
• Compressor Wheel Trim: 56
• Compressor Housing A/R: 0.60
• Compressor Inlet: 5″
• Compressor Outlet: V-band (4.25″ outer diameter, 3.25″ inner diameter)
• Compressor Housing Feature: Built-in ported shroud (anti-surge)
• Turbine Wheel Inducer: 87.0mm
• Turbine Wheel Exducer: 80.2mm
• Turbine Wheel Trim: 85 trim
• Bearing System: Dual Ball Bearing
• HP Capacity: 950+ HP
• Turbine Housing Option: T4 Divided, 4″ V-band, 1.01 A/R
• Turbine Housing Option: T4 Divided, 4″ V-band, 1.15 A/R
• Turbine Housing Option: T4 Divided, 4″ V-band, 1.28 A/R
• Turbine Housing Option: T4 Divided, 4″ V-band, 1.44 A/R
• Turbine Housing Option: T4 Undivided, 4″ V-band, 1.44 A/R
• Turbine Housing Option: T6 Divided, 5″ V-band, 1.15 A/R
• Turbine Housing Option: V-Band inlet & outlet, 1.15 A/R
• Turbine Housing Option: V-Band inlet & outlet, 1.28 A/R
• Turbine Housing Option: V-Band inlet & outlet, 1.44 A/R
• Turbine Housing Option: TiAL V-band inlet & outlet, 1.02 A/R
• Turbine Housing Option: TiAL V-band inlet & outlet, 1.16 A/R
• Turbine Housing Option: TiAL V-band inlet & outlet, 1.30 A/R

Performance & Application

The GTX4594R is built for large-displacement or high-boost applications targeting well beyond 900 horsepower, making it a natural fit for builders who have outgrown a GT42 or GT45 series turbo but want a bolt-compatible upgrade. Its dual ball bearing core supports quick spool response for a turbo of this flow capacity, while the high-flowing compressor housing and ported shroud design help extend the usable range before surge. With a choice of divided or undivided T4, T6 divided, or V-band inlet turbine housings, this turbo can be tailored to manifold style and driving demands, from track-focused response to sustained high-RPM top-end power.

Compatibility & Fitment

• Externally interchangeable with GT42 series turbochargers
• Externally interchangeable with GTX42 series turbochargers
• Externally interchangeable with GT45 series turbochargers

Frequently Asked Questions

How much horsepower can the GTX4594R support?

The GTX4594R is capable of supporting over 950 horsepower.

Is the GTX4594R a ball bearing turbo?

Yes, the GTX4594R is a dual ball bearing turbocharger.

What turbine housing options are available for the GTX4594R?

It is available in T4 (divided or undivided), T6 divided, or V-band inlet turbine housings, including TiAL V-band configurations, across a range of A/R ratios.

Is the GTX4594R interchangeable with other Garrett turbos?

Yes, it is externally interchangeable with GT42, GTX42, and GT45 series turbochargers.

For builders pushing well past 900 horsepower and demanding proven flow, response, and drop-in compatibility with existing GT42/GT45 platforms, the GTX4594R stands as a top-tier choice in Garrett’s GTX-R lineup.