Garrett GTW3476JB 58/57MM (aka GTW5857JB) Journal Bearing SuperCore (Turbo w/o Tbn Hsg) 841297-5001S

The Garrett GTW3476JB SuperCore is built for enthusiasts and engine builders who want proven GTW Series performance in a supercore configuration, giving you the flexibility to pair it with your own turbine housing. As Garrett’s performance answer to the popular 5857 size turbo, it delivers serious flow potential without the premium price tag of a fully custom build.

Specifications

• Compressor Wheel Inducer: 58.3mm
• Compressor Wheel Exducer: 76.4mm
• Compressor Wheel Trim: 58
• Turbine Wheel Inducer: 65.0mm
• Turbine Wheel Exducer: 56.6mm
• Turbine Wheel Trim: 76
• Bearing Type: Journal Bearing
• Frame Size: T04E Frame
• Compressor Inlet: 4″
• Compressor Outlet: 2″
• HP Potential: 700 HP potential flow
• Additional Feature: Built-in & machined anti-surge
• Garrett P/N: 841297-5001S
• Also Known As: GTW5857JB

Performance & Application

The GTW3476JB is engineered for builders chasing strong mid-range and top-end power without sacrificing the flexibility to select their own turbine housing configuration. Its journal bearing design and T04E frame make it a competitive, budget-conscious option for those targeting serious horsepower gains. The integrated anti-surge feature helps extend the usable compressor map, supporting a broader operating range for high-output builds. This supercore is ideal for performance-focused platforms where a 700 HP potential flow ceiling meets the popular 5857 size turbo class.

Frequently Asked Questions

What HP can the GTW3476JB support?

The GTW3476JB delivers 700 HP potential flow.

Is this a ball bearing or journal bearing turbo?

The GTW3476JB is a journal bearing supercore.

What does GTW5857JB refer to?

GTW5857JB is an alternate name (alias) for the Garrett GTW3476JB.

What are the compressor inlet and outlet sizes?

The T04E frame features a 4″ inlet and 2″ outlet.

For builders who demand Garrett-grade performance in the 5857 size class, the GTW3476JB SuperCore delivers the flow potential and construction quality to back up a serious power build.