The Garrett GTX4088R Supercore is the heart of a serious high-horsepower turbo build, delivered without a turbine housing so builders can pair it with the exact housing configuration their application demands. Engineered for enthusiasts chasing big power with a responsive, ball bearing platform, this core gives tuners and shops the flexibility to finish the turbo to their own specification. It’s the choice for those who know exactly what they need and want a proven Garrett GTX-R foundation to build from.

Specifications

• Compressor Wheel Inducer: 65.0mm
• Compressor Wheel Exducer: 88.4mm
• Compressor Wheel Trim: 54
• Compressor Housing A/R: .72
• Frame Size: T04H
• Compressor Inlet: 4″ (Ported shroud anti surge)
• Compressor Outlet: 2.5″
• Turbine Wheel Inducer: 77.0mm
• Turbine Wheel Exducer: 68.0mm
• Turbine Wheel Trim: 78
• Bearing Type: Ball Bearing
• Garrett P/N: 825614-5005S

Performance & Application

Built on the T04H frame with a ported shroud anti-surge compressor inlet, the GTX4088R Supercore is engineered to flow high volumes of air for serious power builds. The 65mm inducer and 88.4mm exducer compressor wheel combination, paired with a 78 trim turbine wheel, is designed to deliver responsive boost characteristics as part of Garrett’s GTX-R ball bearing lineup. This core is intended for builders assembling a custom turbocharger setup who need to select or supply their own turbine housing to complete the unit.

Frequently Asked Questions

Does the GTX4088R Supercore include a turbine housing?

No, this is a supercore, meaning it is the turbo without a turbine housing included.

What is the compressor housing A/R ratio?

The GTX4088R Supercore uses a .72 A/R compressor housing.

Is the GTX4088R a ball bearing or journal bearing turbo?

The GTX4088R is part of Garrett’s GTX-R Ball Bearing lineup.

What are the compressor inlet and outlet sizes?

The compressor housing features a 4″ inlet with a ported shroud anti-surge design and a 2.5″ outlet.

For builders who need a high-flow ball bearing core to finish their own way, the Garrett GTX4088R Supercore delivers the proven compressor and turbine wheel geometry that serious power builds are built around.