Garrett GTW3884JB 64mm (aka GTW6465JB) Journal Brn Turbo .95 A/R T4 Div w/ 3″ VB Exit

The Garrett GTW3884JB delivers serious high-flow performance for enthusiasts building a powerful street or race application without the premium cost of a ball bearing unit. Engineered as Garrett’s performance answer to the popular 6466 size turbo, this journal bearing GTW Series turbocharger is built for those who want proven Garrett engineering and strong top-end power at a competitive price point. It’s the right choice for builders seeking substantial horsepower capability paired with a T4 divided housing configuration and a modern V-band turbine exit.

Specifications

• Compressor Wheel Inducer: 64.3 mm
• Compressor Wheel Exducer: 84.4 mm
• Compressor Wheel Trim: 58
• Turbine Wheel Inducer: 74.2 mm
• Turbine Wheel Exducer: 64.6 mm
• Turbine Wheel Trim: 76
• Turbine Housing A/R: .95 A/R T4 Divided
• Turbine Housing Exit: 3″ GT V-band
• Bearing Type: Journal Bearing
• Compressor Housing: T04S Frame
• Compressor Inlet: 4″
• Compressor Outlet: 2.5″
• Anti-Surge: Built-in & machined anti-surge porting
• HP Potential: 900 HP
• Garrett P/N: GTW3884JB
• Also Known As: GTW6465JB

Performance & Application

The GTW3884JB is built for high-performance applications targeting up to 900 HP of potential flow, making it a strong fit for serious street and competition builds. Its journal bearing design paired with the .95 A/R T4 divided turbine housing supports pulse-separated exhaust energy for efficient spool characteristics while still delivering strong top-end power. The T04S compressor housing’s built-in and machined anti-surge porting helps extend the usable compressor map, giving builders more flexibility as boost and airflow demands increase. This configuration suits enthusiasts who want GTW Series performance and the 6466-class flow capability without stepping up to a ball bearing unit.

Frequently Asked Questions

What HP can the GTW3884JB support?

The GTW3884JB offers up to 900 HP potential flow.

Is the GTW3884JB a ball bearing or journal bearing turbo?

This turbocharger uses a journal bearing design.

What compressor housing configuration does the GTW3884JB use?

It features a T04S Frame compressor housing with a 4″ inlet and 2.5″ outlet, including built-in and machined anti-surge porting.

What is the A/R ratio and turbine housing configuration?

The GTW3884JB comes with a .95 A/R T4 divided turbine housing featuring a 3″ GT V-band exit.

What does GTW6465JB refer to?

GTW6465JB is an alternate name for the Garrett GTW3884JB turbocharger.

For builders who want Garrett’s GTW Series engineering, strong 900 HP potential, and a T4 divided housing with modern V-band exit, the GTW3884JB delivers proven performance at a competitive price.